Orange Color Research Articles

Electrofluorochromic Hydrogels by Oligothiophene-Based Color-Tunable Fluorescent Dye Doping.

Soft electronic materials hold great promise for advancing flexible functional devices. Among the various soft materials available, hydrogels are particularly attractive for soft electronic device development due to their inherent properties, including transparency, shape adaptability through swelling/deswelling, and self-healing capabilities. Transparent hydrogels contribute to the creation of advanced smart devices such as sensors, smart windows, and anticounterfeiting technologies. Poly(vinyl alcohol) hydrogels are used as a platform for creating electrofluorochromic (EFC) devices in combination with oligothiophene-conjugated benzothiazole derivatives (OCBs) as fluorescent emitters. OCBs demonstrated excited-state intramolecular proton transfer (ESIPT) behavior with a large Stokes shift and emission changes responsive to solvent polarity and pH stimuli. Even in the solid state, OCBs exhibited strong fluorescence emission across a wide range of colors from blue to red, making them exceptionally well-suited for EFC device development. Their quantum yields in the powder state were obtained between 2.3% and 19.9%. Through the incorporation of OCBs into a PVA hydrogel (OCB@PVA), we achieved the successful fabrication of flexible EFC devices, including electronic paper and smart panels. When electric potentials (-2.4 and +2.4 V) were applied in OCB@PVA, fluorescence color changes were observed by an electrochemically induced pH change owing to electrohydrolysis of water. These devices demonstrated the potential of OCB@PVA hydrogels in the realm of flexible electronics. They could be used to create innovative and versatile devices with stimuli-responsive fluorescence properties.

Utilization Of Kuku Pancar (Lawsonia Inermis Lin) Leaves as a Substitute For Eosin Dye in The Examination of Soil Transmitted Helminth (STH) Eggs

Nail surfacing leaves (Lawsonia inermis lin) are natural materials commonly used as dyes, because of the content of chemical compounds in them such as lawsone, flavonoids, tannins and anthocyanins, therefore nail surfacing leaves can be used as an alternative dye to replace 2% Eosin in STH worm egg examination, because it has the same properties as 2% Eosin and can produce an orange yellow color after the extraction process. The research objective is to determine the results of nail surfacing leaves (Lawsonia inermis lin) can be used as an alternative substance to replace Eosin in the examination of STH (soil transmitted helminth) worm eggs. The methods of this research is using is experimental, where this study looks at the clarity of soil transmitted helminth (STH) worm eggs on preparations, using coloring from the results of soaking the leaves of the nail surf as a substitute for Eosin. The results of the research is that the coloring results obtained in each variation of immersion time are good. The conclusion of this research is that the staining of worm eggs using the results of immersion of nail surfacing leaves for 12 hours, 24 hours, 36 hours, and 48 hours can be used as an alternative dye in the examination of STH worm eggs.

Efficacy of coloured lenses for patients diagnosed with visual stress

ABSTRACT Clinical relevance Colour overlays and lenses are used to relieve symptoms in some patients diagnosed with visual stress, but evidence to support this practice is lacking. In this small randomised crossover trial, a range of colours are beneficial and precise colour specification does not enhance this effect. Background This randomised, double-masked crossover trial aimed to test effectiveness of precisely selected lens tints for visual stress. Methods Twenty-nine participants aged 11 to 72 (mean 30) years diagnosed with visual stress were issued with their selected coloured overlay then with tinted lenses at two colour settings. An eye examination and coloured overlay test were followed by intuitive colorimetry to select a colour to minimise symptoms (optimal tint) and the closest setting at which the symptoms returned (sub-optimal, or placebo tint). The tints were worn for one month each in randomised order. Reading speed was measured using the Wilkins Rate of Reading Test, a subjective scale was used to gauge symptoms, and the patient was asked to indicate whether one of the tints alleviated their symptoms more than the other. Results Reading speed was significantly higher with colour than without (p < 0.001), but was similar with the overlay and both tints (p = 1.0). Discomfort/distortion rating (1–7) was lower with colour than without (p < 0.001), but no difference was found between the overlay and both tints (p > 0.1). About half (47%) of the patients preferred/strongly preferred their optimal tint, and 39% preferred/strongly preferred their sub-optimal tint, while 14% had no preference. Conclusions While our patients read more quickly and were more comfortable when using a tint, there was no difference in outcome between the optimal and sub-optimal tints. These results suggest that for patients diagnosed with visual stress, precision tints are no more helpful than sub-optimal, placebo tints.

Hairy tongue secondary to antibiotic usage

Hairy tongue, also known as black hairy tongue, is a non-malignant disorder characterized by the enlargement of the filiform papillae, resulting in a velvety look on the surface of the tongue. The elongated papillae exhibit a range of coloration, spanning from a yellowish white hue to shades of brown to black. The precise cause of this illness remains uncertain; nevertheless, it has been linked to many predisposing factors including extensive tobacco use, inadequate oral hygiene practices, administration of topical or systemic antibiotics, and other related disorders. In this case report, we describe the clinical presentation of a 27-year-old patient who was diagnosed with hairy tongue as a result of antibiotic use. In addition to that, we provide a concise summary of the ailment.

Programming structural-colour modulation range of elastomer enables information storage

ABSTRACT Cholesteric liquid crystal elastomers (CLCEs) has garnered significant attention in the field of information display and storage. Obtaining multiple structural colours in a single elastomer film is highly desirable but presents a considerable challenge. Here, we have successfully achieved manipulable range of structural colours in a CLCE film by ingeniously introducing the photopolymerisation during thiol-acrylate reaction process. This particular strategy involves triggering spatial shrinkage of the polymer network in a pre-designed region following solvent evaporation, resulting in a blue shift of the structural colour compared to the background. Consequently, we can construct multi-colour and multi-pattern elastomer films by precisely controlling the localised polymerisation. Notably, these patterns can be concealed in a reversible manner as the film undergoes a specific degree of elongation and can be restored when external force is removed. This work demonstrates a straightforward method of programming structural-colour modulation range, eliminating the need for material changes or intricate preparation processes, broadening the applications of stretchable elastomers in information storage, encryption, anti-counterfeiting, and dynamic photonics.

Performance of a Wearable Ring in Controlled Hypoxia: A Prospective Observational Study.

Over recent years, technological advances in wearables have allowed for continuous home monitoring of heart rate and oxygen saturation. These devices have primarily been used for sports and general wellness and may not be suitable for medical decision-making, especially in saturations below 90% and in patients with dark skin color. Wearable clinical-grade saturation of peripheral oxygen (SpO2) monitoring can be of great value to patients with chronic diseases, enabling them and their clinicians to better manage their condition with reliable real-time and trend data. This study aimed to determine the SpO2 accuracy of a wearable ring pulse oximeter compared with arterial oxygen saturation (SaO2) in a controlled hypoxia study based on the International Organization for Standardization (ISO) 80601-2-61:2019 standard over the range of 70%-100% SaO2 in volunteers with a broad range of skin color (Fitzpatrick I to VI) during nonmotion conditions. In parallel, accuracy was compared with a calibrated clinical-grade reference pulse oximeter (Masimo Radical-7). Acceptable medical device accuracy was defined as a maximum of 4% root mean square error (RMSE) per the ISO 80601-2-61 standard and a maximum of 3.5% RMSE per the US Food and Drug Administration guidance. We performed a single-center, blinded hypoxia study of the test device in 11 healthy volunteers at the Hypoxia Research Laboratory, University of California at San Francisco, under the direction of Philip Bickler, MD, PhD, and John Feiner, MD. Each volunteer was connected to a breathing apparatus for the administration of a hypoxic gas mixture. To facilitate frequent blood gas sampling, a radial arterial cannula was placed on either wrist of each participant. One test device was placed on the index finger and another test device was placed on the fingertip. SaO2 analysis was performed using an ABL-90 multi-wavelength oximeter. For the 11 participants included in the analysis, there were 236, 258, and 313 SaO2-SpO2 data pairs for the test device placed on the finger, the test device placed on the fingertip, and the reference device, respectively. The RMSE of the test device for all participants was 2.1% for either finger or fingertip placement, while the Masimo Radical-7 reference pulse oximeter RMSE was 2.8%, exceeding the standard (4% or less) and the Food and Drug Administration guidance (3.5% or less). Accuracy of SaO2-SpO2 paired data from the 4 participants with dark skin in the study was separately analyzed for both test device placements and the reference device. The test and reference devices exceeded the minimum accuracy requirements for a medical device with RMSE at 1.8% (finger) and 1.6% (fingertip) and for the reference device at 2.9%. The wearable ring meets an acceptable standard of accuracy for clinical-grade SpO2 under nonmotion conditions without regard to skin color. ClinicalTrials.gov NCT05920278; https://clinicaltrials.gov/study/NCT05920278.

Isolation of β-Cyclodextrin Gycosyl Transferase (β-CGTase) Producing Bacteria from Potato Plantation Soil

Cyclodextrin glycosyltransferase (CGTase) is an extracellular enzyme produced by several microorganisms, particularly bacteria, that converts starch into cyclodextrin (CD). CD has various applications in fields such as food, textiles, pharmaceuticals, chemistry, and biotechnology. The objective of this study was to isolate β-CGTase-producing bacteria from soil in a potato plantation located in Kerinci, and to conduct their characterization. Screening was conducted using Horikoshi agar media with phenolphthalein and methyl orange color indicators. The results indicated that one isolate, coded CK-2, produced the optimum β-CGTase enzyme when incubated for 30 hours at 37 ºC and pH 10. The CGTase enzyme converted starch to CD when incubated for 60 minutes at 37 ºC and pH 7. The CK-2 isolate was identified as monobacilli Gram-positive bacteria, having spores, positive in the catalase test, and motile. The study concluded that the bacteria producing β-CGTase enzyme are found in the soil of potato plantations in Kerinci, which is believed to originate from the genus Bacillus sp.

Perancangan Produk Aksesoris Fashion dengan Pemanfaatan Limbah HDPE dan PPE

Plastic is the most frequently used material as a storage container by the public. Its various purposes, wide range of colors, types, and sizes, its versatility makes plastic a popular choice of material. One of the characteristics of plastic is its single-use, which implies it often being thrown away after one use and increases the amount of plastic waste in circulation. One of the most frequently found plastic wastes in circulation is HDPE plastic, which has become a pollutant that contaminates both land and bodies of water. Management of plastic waste is currently still ineffective, that eventually end up in landfills or burned. HDPE plastic waste can be processed and repurposed into a new product to produce jewelry designs. HDPE plastic that will be processed will undergo a meticulous and attentive process to ensure its quality and cleanliness, so it can remain safe when it has direct contact to human skin. Plastic that is one of the biggest pollutants in the world, can be repurposed and produced as a new product that can be used every day, to reduce the number of plastic pollutants.

Development of topical silver nano gel formulation of Bixin: Characterization, and evaluation of anticancer activity

ObjectiveSkin cancer refers to the pathological condition characterized by the proliferation of atypical skin cells in an uncontrolled manner. Plant-based products such as bixin although show promising anticancer properties, but maintaining their stability in a formulation is a difficult task. The objective of the research is to formulate a silver nanoparticle gel preparation of bixin and evaluate its anticancer properties. MethodsThe extract from Bixa orellana seed was prepared by hot extraction technique to isolate the active ingredient, bixin. A green synthesis approach was utilized for preparing the silver nanoparticle gel of bixin (BOAgNPs). Characterization of silver nanoparticles was done using FTIR, scanning electron microscopy, compatibility study, homogeneity testing, pH evaluation, and drug content determination. The in-vitro anticancer activity was performed using cell lines (B16F10) and in-vivo by chemical carcinogen (7,12-dimethylbenz (a) anthracene) in mice. ResultsThe BOAgNPs-loaded topical gel was found to be homogeneous (clear orange color) and pH-compatible (pH ≈ 6.66) with the skin. The characterization studies indicated the presence of all functional groups in the formulation. An optimized batch of bixin-nano gel showed about 60% inhibitory effects on B16F10 cell lines (in-vitro activity) when equated with a reference drug, 5-fluorouracil. The in-vivo anticancer study suggested suppression of tumorigenesis and promotion of the healing process with bixin-nano gel application on the skin. ConclusionThe results suggested the promising anticancer property of bixin when formulated in silver nanoparticle gel. The preparation of silver particles nano gel with bixin might provide an effective alternative option for treating skin cancers, provided more research complements the findings of the present study.

Removal of colour methylene red orange (MRO) by using commercial granular activated carbon (CGAC)

Abstract This study examined the effectiveness of granular activated carbon as an adsorbent for removing methylene red orange (MRO) colour from synthetic wastewater. The experiment involved using 250 mL conical flasks and maintaining the pH at an optimised value of 9. A concentration of 1.6 g of commercial granular activated carbon (CGAC) was mixed with 100 mL of MRO solution (200 mg/L) and agitated at room temperature. Samples were collected at specific time intervals to measure the MRO concentration. The collected data was analysed to describe the interaction between adsorbates and adsorbents. The Langmuir model showed a good fit for isotherm studies, supporting the efficacy of CGAC as an adsorbent for MRO dye removal. This study highlights the potential of CGAC for MRO dye removal and contributes to the understanding of the adsorption process.

SPNet: Semantic preserving network with semantic constraint and non-semantic calibration for color constancy

Recent methods introduce semantics obtained from pre-trained classification models into color constancy to guide the model in learning object-color mapping, thereby improving the illumination estimation ability. However, the task discrepancy between classification and color constancy leads to a representation learning gap, resulting in semantic loss during training. Moreover, semantic-based methods emphasize semantic regions, leading to the neglect of clues contained in non-semantic regions. Overall, semantic-based methods face the challenge of underutilizing critical information. To address this problem, we propose a Semantic Preserving Network (SPNet). We first design a Semantic Constraint Module (SCM) in SPNet. SCM provides semantic constraints to ensure uninterrupted semantic knowledge transfer during training, which prevents semantic loss. Additionally, we further propose an Auxiliary Calibration Module (ACM). ACM explores background regions with a restricted range of innate colors. The high consistency property of their color contributes to the calibration of illumination colors. Meanwhile, ACM recalibrates local–global consistency to avoid large estimation bias in other background regions where illumination clues are insufficient. Extensive experiments on the benchmark datasets show that our method achieves superior performance without extra inference consumption.

Technological research of syrup with dipyridamole

A new liquid dosage form with dipyridamole has been obtained. A 50 % fructose solution was selected as the auxiliary component. The flavoring agent was «Orange», and the coloring agent was an orange color. The resulting dosage form, i.e. syrup, has a pleasant color, taste, and smell. 0.5 % sodium benzoate was used as a preservative, which provided a bacteriostatic effect for 24 months. Purpose of the work: to develop an optimal technological scheme for the production of a syrup with dipyridamole, establish critical points, and justify the use of flavoring and coloring agents and preservatives. Materials and methods. An integrated approach, based on modern principles of drug development (ICH) and implemented by means of modern equipment and the necessary research methods, was used. When developing the original syrup dosage form of dipyridamole, chemical, physicochemical, technological, pharmacological, and microbiological research methods were utilized. Technological methods included the preparation of fructose syrup (50 %); then dipyridamole (0.325 %) was added to the intermediate product. Results. The introduction of dipyridamole into a liquid dosage form, i.e. syrup, is a promising way to expand the range of dosage forms (DF) of dipyridamole, represented only by film-coated tablets and a suspension for oral administration (Rosemont Pharmaceuticals Ltd, UK). Conclusion. The result of the research has been the production of syrup with dipyridamole. It was found that the best composition was based on fructose, which was superior in taste to sucrose and sorbitol. Flavoring agents «Cherry», «Orange», and «Cocoa» were added to sugar-based syrups. The «Orange» turned out to be the optimal flavoring agent.

Thermochromic Polymer Nanocomposites for the Heat Detection System: Recent Progress on Properties, Applications, and Challenges.

Reversible thermochromic polymers have emerged as compelling candidates in recent years, captivating attention for their application in heat detection systems. This comprehensive review navigates through the multifaceted landscape, intricately exploring both the virtues and hurdles inherent in their integration within these systems. Their innate capacity to change colour in response to temperature fluctuations renders reversible thermochromic nanocomposites promising assets for heat detection technologies. However, despite their inherent potential, certain barriers hinder their widespread adoption. Factors such as a restricted colour spectrum, reliance on external triggers, and cost considerations have restrained their pervasive use. For instance, these polymer-based materials exhibit utility in the domain of building insulation, where their colour-changing ability serves as a beacon, flagging areas of heat loss or inadequate insulation, thus alerting building managers and homeowners to potential energy inefficiencies. Nevertheless, the limited range of discernible colours may impede precise temperature differentiation. Additionally, dependency on external stimuli, such as electricity or UV light, can complicate implementation and inflate costs. Realising the full potential of these polymer-based materials in heat detection systems necessitates addressing these challenges head-on. Continuous research endeavours aimed at augmenting colour diversity and diminishing reliance on external stimuli offer promising avenues to enhance their efficacy. Hence, this review aims to delve into the intricate nuances surrounding reversible thermochromic nanocomposites, highlighting their transformative potential in heat detection and sensing. By exploring their mechanisms, properties, and current applications, this manuscript endeavours to shed light on their significance, providing insights crucial for further research and potential applications.

Generation of Wide Color Gamut in a Collisional and Magnetized Plasma by Laser‐Induced Coloration on Composite Structure Surfaces

AbstractIn this paper, a new scheme for generating a wide gamut of structural colors on the thin‐film‐stack‐based (TFSB) substrates is proposed. The TFSB surfaces consist of titanium/random gold nanoparticles (AuNPs) and titanium/ random gold and copper nanoparticles (Au+CuNPs), which can trigger more resonance absorption and widen the color gamut. The electric fields in two designed structures are simulated, and the results showed that the random distribution of AuNPs and Au+CuNPs enhance the uniform local surface plasmon resonance (LSPR) response. This enhancement is crucial in broadening the coverage of the reflection spectrum, which enables the generation of a wide range of colors, including green and red. The influence of laser parameters on the color of TFSB substrates and tested their durability in terms of time is analyzed. Finally, a color palette and made structural color patterns on TFSB by nanosecond pulsed laser are prepared. The proposed new scheme can be easily fabricated by magnetron sputtering without requiring additional procedures, which can open new perspectives in plasmonic colors. This work demonstrates that the promising potential of methods in creating a wide color gamut on metallic surfaces. Additionally, it serves as a means to store information for the preservation and protection of traditional cultures.

Tuning the emission of anti-rigidochromic fluorophore by alternating the polymer matrices for advanced data encryption

Anti-rigidochoromic fluorophores with bathochromic emission in rigidifying polymer matrix offer advantages such as high fluorescent contrast, broadly tunable emissions, and versatile stimuli-responsive behaviors. In this work, we systematically investigated the impact of polymer chemical structure on the emission of the anti-rigidochromic fluorophore. By precisely tuning intermolecular polar-π and π-π interactions between the polymer matrix and fluorophore, a range of emission colors could be achieved, spanning from deep blue (450 nm) to the yellow-orange region (600 nm). Notably, the emission of polymer/fluorophore composites can be precisely adjusted over temperature. Leveraging the distinctive features, we showcase advanced fluorescence encryption using the non-emissive polymers as an information carrier and the fluorophore as the decryption key, which efficiently addresses issues of conventional fluorophores such as photo-bleaching and low adhesive force. This work establishes the structure-fluorescence relationship for the anti-rigidochromic system and extends its application for advanced data encryption with a high level of security.

Polymorphism in the aggressive mimicry lure of the parasitic freshwater mussel Lampsilis fasciola.

Unionoid freshwater mussels (Bivalvia: Unionidae) are free-living apart from a brief, obligately parasitic, larval stage that infects fish hosts, and gravid female mussels have evolved a spectrum of strategies to infect fish hosts with their larvae. In many North American species, this involves displaying a mantle lure: a pigmented fleshy extension that acts as an aggressive mimic of a host fish prey, thereby eliciting a feeding response that results in host infection. The mantle lure of Lampsilis fasciola is of particular interest because it is apparently polymorphic, with two distinct primary lure phenotypes. One, described as "darter-like", has "eyespots", a mottled body coloration, prominent marginal extensions, and a distinct "tail". The other, described as "worm-like", lacks those features and has an orange and black coloration. We investigated this phenomenon using genomics, captive rearing, biogeographic, and behavioral analyses. Within-brood lure variation and within-population phylogenomic (ddRAD-seq) analyses of individuals bearing different lures confirmed that this phenomenon is a true polymorphism. The relative abundance of the two morphs appears stable over ecological timeframes: the ratio of the two lure phenotypes in a River Raisin (MI) population in 2017 was consistent with that of museum samples collected at the same site six decades earlier. Within the River Raisin, four main "darter-like" lure motifs visually approximated four co-occurring darter species (Etheostoma blennioides, E. exile, E. microperca, and Percina maculata), and the "worm-like" lure resembled a widespread common leech, Macrobdella decora. Darters and leeches are typical prey of Micropterus dolomieui (smallmouth bass), the primary fish host of L. fasciola. In situ field recordings of the L. fasciola "darter" and "leech" lure display behaviors, and the lure display of co-occurring congener L. cardium, were captured. Despite having putative models in distinct phyla, both L. fasciola lure morphs have largely similar display behaviors that differ significantly from that of sympatric L. cardium individuals. Some minor differences in the behavior between the two L. fasciola morphs were observed, but we found no clear evidence for a behavioral component of the polymorphism given the criteria measured. Discovery of discrete within-brood inheritance of the lure polymorphism implies potential control by a single genetic locus and identifies L. fasciola as a promising study system to identify regulatory genes controlling a key adaptive trait of freshwater mussels.

Technology of Dyeing beyond Text

A major source in the research on Baltic cultural history (Latvia, Estonia), including studies dedicated to the clothing of local inhabitants, are the drawings and descriptions of Johann Christoph Brotze (1742–1823), which date back to the turn of the 18th and 19th centuries. They contain references to dyes and dyeing methods used by local peasants. The information recorded by J. C. Brotze, although fragmentary, is valuable because researchers lack documentary sources about the dyeing methods used in the 18th century in the territory of present-day Latvia. Additional research yields more extensive information about the contents of the descriptions. The current article will describe the experimental method that enabled the establishment of the specific dyeing technique, which, using Bixa orellana L., was employed to obtain the particular orange color referred to in the descriptions.

Technical study on the early twentieth century’s embroidered women waistcoat in Gyalrong Tibetan area in Sichuan, China

In the early twentieth century, traditional handicraft was challenged by the latest technology in China. It is reflected by ethnic costumes combining new and old, as in the waistcoat of this study. This waistcoat made at Gyalrong Tibetan area in Sichuan, China, displays unique local features in terms of its brilliant colors and comprehensive craftsmanship. This study employs techniques such as optical microscopy, infrared spectroscopy, scanning electron microscope and high performance liquid chromatography-mass spectrometry to investigate various aspects of this waistcoat, including its fabrics and dyes. The results showed that the waistcoat was primarily made of cotton and silk, with a bamboo paper layer, and that silk as well as twisted gold and silver threads were employed for the embroidery. Various embroidery techniques were applied, with patterns, color combinations, and characteristics being consistent with those of Tibetan and Shu (蜀) embroidery. In terms of dyeing technology, a wide range of colors were achieved through multi-step dyeing processes using natural dye stuffs like pagoda bud, and synthetic dyes like magenta. These findings indicates that modern technologies were well integrated into traditional garment manufacture in the early twentieth century in China.

РОЛЬ ВІТРАЖІВ В СУЧАСНОМУ ОЗДОБЛЕННІ ІНТЕР’ЄРІВ ЖИТЛОВИХ ПРИМІЩЕНЬ

Stained glass has attracted the attention of art critics and scientists for centuries. Stained glass art plays a special artistic role in decorating windows, doors, and ceilings. In addition to the traditional use of stained glass windows, they are used in the design of modern interiors. Although stained-glass windows are not a common design solution in interior design, they are increasingly used for their individualization in modern decoration. In the process of researching decorative decoration of modern interiors with the use of stained glass, new techniques and technologies of their implementation, compositional solutions, their color range were considered, and the main features of artistic expression were revealed. In modern interiors of residential premises, you can find stylized decorative and ornamental stylized stained-glass compositions, which are characterized by a linear division of the glass canvas with the use of faceted glass elements. With the help of stained glass windows, the space of the living room is filled with warm or cold, monochrome or polychrome colors, which enhances the visual perception of certain interior elements. Stained glass compositions using traditional and modern production technologies were analyzed and their role in modern interior design was determined.

Simultaneous modulation of multicolor upconversion emission and thermal‐sensing performance of Ba5Zn4Y8O21 phosphors

AbstractIn this study, we report the modulation of the emission color and optical temperature‐sensing properties of Er3+ in Ba5Zn4Y8O21 crystals. Er3+ single‐doped Ba5Zn4Y8O21 phosphors showed green emission under 980 nm excitation. When codoping with Yb3+ ions, the red emission component from the Er3+ ions increased significantly, and the sample emission turned orange. Yb3+–Er3+ codoped Ba5Zn4Y8O21 samples exhibited bright red emission with a maximum IR/IG value of 89.30 when excited with a longer wavelength, 1550 nm. A broad range of emission colors could be modulated by adjusting the dopant concentration. The possible modulation mechanisms and upconversion processes were analyzed based on the luminescence decay curves and power‐dependent emission intensities. Furthermore, the optical temperature‐sensing properties of Ba5Zn4Y8O21:Er3+ and Ba5Zn4Y8O21:Er3+, Yb3+ phosphors with thermal coupled energy levels (TCELs) and nonthermal coupled energy levels (N‐TCELs) of Er3+ ions were investigated using fluorescence intensity ratio technique. Based on the TCELs (2H11/2/4S3/2), the Er3+ single‐doped and Yb3+–Er3+ codoped Ba5Zn4Y8O21 phosphors present the similar optical thermometry behaviors under 980 and 1550 nm excitation. The highest absolute (Sa) and relative sensitivity (Sr) are 3.95 × 10−3 K−1 at 573 K and 1.31% K−1 at 303 K, respectively. Based on N‐TCELs (4F9/2/2H11/2), the temperature‐sensing performance depends on the Yb3+ dopant and excitation wavelength. The highest values for Sa and Sr reached 5.46 K−1 at 303 K and 1.38% K−1 at 573 K for the Ba5Zn4Y8O21:Er3+, Yb3+ phosphor under 1550 nm excitation, respectively. In addition, the present phosphor exhibited high stability and repeatability over a wide temperature range. These results indicate that the multicolor modulation upconversion Ba5Zn4Y8O21‐based phosphor can be considered a potential reusable optical thermometer for noncontact temperature detection.