Process for coloring human keratin fibers, characterized in that a dyeing composition comprising, in an appropriate cosmetic medium, at least one disulfide dye selected from the dyes of the formulas (I), (II), is applied on the fibers III) or (IV) below: their salts, solvates, such as hydrates, formulas in which: * A and A ', identical or different, represent a radical containing at least one chromophore from cyanine-type dyes, containing said chromophores A and / or A 'a cationic radical carried by or included in at least one of the chromophores, said cationic radical being a quaternary ammonium； * V and V ', identical or different, represent a group that bridges； * v and v ', identical or different represent 0 or 1； * X, identical or not, represents a linear or branched C1-C30 hydrocarbon chain, saturated or unsaturated, possibly interrupted and / or eventually terminated at one or two of its ends by one or more divalent groups or combinations thereof, selected from: - N (R) -, -N + (R) (R) -, -O-, -S-, -CO- and -SO2-, with R, identical or different, selected from a hydrogen or a C1-alkyl radical -C4, hydroxyalkyl or aminoalkyl； - a (hetero) cyclic aromatic radical or not, saturated or unsaturated, condensed or not, which optionally contains one or more identical or not identical heteroatoms, optionally substituted； * the coefficient p is equal to 0 or 1； * Csat and C'Sat, identical or different, represent a linear or branched C1-C18 alkylene chain, optionally substituted and possibly cyclic； * D corresponds to a radical selected from the hydroxy, hydroxyalkyl, alkoxy, carboxylic, carboxylate, amino, alkylamino or dialkylamino radicals.Procedimiento de coloración de las fibras queratínicas humanas, caracterizado por que se aplica sobre las fibras una composición tintórea que comprende, en un medio cosmético apropiado, al menos un colorante disulfuro seleccionado entre los colorantes de las fórmulas (I), (II), (III) o (IV) siguientes: sus sales, solvatos, tales com
