Abstract: Pulverulent composition (Ci) in the form of a powder including, for 100% of the weight thereof: i) from 89.5% to 94.65% by weight of at least one filler (AC); ii) from 5% to 10% by weight of at least one coloured pigment (PC); iii) from 0.35% to 0.5% by weight of at least one polymer of crosslinked anionic polyelectrolyte type (P) which includes, for 100 mol %, from 65 mol % to 95 mol % of monomer units derived from partially or totally salified 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid, from 4.8 mol % to 25 mol % of monomer units derived from at least one neutral monomer chosen from the elements of the group constituted by 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, N,N-dialkyl acrylamides in which each of the alkyl groups includes between one and four carbon atoms, and from 0.1 mol % to 5 mol % of monomer units derived from at least one monomer of formula (I).