A number of new amino- and hydroxy-anthraquinone dyes with 1,1-dihydropolyfluoroalkyl groups at the nitrogen and oxygen atoms have been prepared. The influence of polyfluoroalkyl groups on the colour of these anthraquinone dyes has been studied. The replacement of the hydrogen atom in the oxy group by polyfluoroalkyl radicals causes a stronger hypsochromic shift of the absorption maximum than the same replacement in the amino group.