Abstract: The invention relates to a process for adsorptive coloration of anodically oxidized surfaces of aluminum and/or aluminum alloys, characterized in that a) an aqueous dyebath is provided, said aqueous dyebath containing an organic dye that fluoresces on irradiation with UV light of a wavelength between 300 and 400 nm, containing not more than 0.4 g/liter of alkaline earth metal ions and having a pH between 4.0 and 10, b) said anodically formed surface is colored by immersion in and/or spraying with said dyebath (a) at a temperature between 10 and 50° C., and c) the colored surface is sealed.