The invention relates to a composition comprising, in a cosmetically acceptable carrier, a system for screening out UV radiation, characterized in that it contains:(a) at least metal oxide-based mineral pigments, and(b) at least one hydroxyalkylurea of formula (I) below: ##STR00001## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently represent a hydrogen atom, a C.sub.1-C.sub.4 alkyl group or a C.sub.2-C.sub.6 hydroxy-alkyl group that may contain from 1 to 5 hydroxyl groups, at least one of the radicals R.sub.1-R.sub.4 representing a hydroxyalkyl group, and also a salt, solvate or isomer thereof, said composition containing no kojic dipalmitate.The invention also relates to the use of a hydroxyalkylurea of formula (I) in a composition comprising, in a cosmetically acceptable carrier, at least metal oxide-based mineral pigments, for reducing, or even eliminating, the whitening effect on the keratin material after application.