A cosmetic agent for changing the color of keratin fibers, comprising, in a cosmetically acceptable carrier, a) at least one compound selected from the group of oxidation dye precursors, substantive dyes and mixtures thereof, b) at least one non-ionic linear silicone polymer of formula in which x represents integers from 10 to 10,000, and R 1 to R 7, each independently of one another, are hydrogen, a hydroxy group, a linear or branched C 1-4 alkyl group or a linear or branched C 1-20 hydroxyalkyl group, wherein the cosmetic agent comprises at least two mutually different linear non-ionic silicone polymers of formula I in a total amount of 0.05 to 1.0 wt.%, based on the total weight of the cosmetic agent, in the form of an emulsion, wherein the emulsion has particles having an average particle diameter D50 of 0.3 μm to 30 μm, a) wherein the first linear non-ionic silicone polymer has the formula and an average molecular weight Mw of 122,000 to 628,000 Da, in which R 2 and R 7, each independently of one another, represent a methyl group, and x represents integers from 1,650 to 8,500, and b) wherein the second linear non-ionic silicone polymer has the formula and an average molecular weight Mw of 3,000 to 97,000 Da, in which R 2 and R 7, each independently of one another, represent a methyl group, and y represents integers of from 40 to 1,300. a) at least one compound selected from the group of oxidation dye precursors, substantive dyes and mixtures thereof, b) at least one non-ionic linear silicone polymer of formula in which x represents integers from 10 to 10,000, and R 1 to R 7, each independently of one another, are hydrogen, a hydroxy group, a linear or branched C 1-4 alkyl group or a linear or branched C 1-20 hydroxyalkyl group, wherein the cosmetic agent comprises at least two mutually different linear non-ionic silicone polymers of formula I in a total amount of 0.05 to 1.0 wt.%, based on the total weight of the cosmetic agent, in the form of an emulsion, wherein the emulsion has particles having an average particle diameter D50 of 0.3 μm to 30 μm, x represents integers from 10 to 10,000, and R 1 to R 7, each independently of one another, are hydrogen, a hydroxy group, a linear or branched C 1-4 alkyl group or a linear or branched C 1-20 hydroxyalkyl group, wherein the cosmetic agent comprises at least two mutually different linear non-ionic silicone polymers of formula I in a total amount of 0.05 to 1.0 wt.%, based on the total weight of the cosmetic agent, in the form of an emulsion, wherein the emulsion has particles having an average particle diameter D50 of 0.3 μm to 30 μm, a) wherein the first linear non-ionic silicone polymer has the formula and an average molecular weight Mw of 122,000 to 628,000 Da, in which R 2 and R 7, each independently of one another, represent a methyl group, and x represents integers from 1,650 to 8,500, and R 2 and R 7, each independently of one another, represent a methyl group, and x represents integers from 1,650 to 8,500, and b) wherein the second linear non-ionic silicone polymer has the formula and an average molecular weight Mw of 3,000 to 97,000 Da, in which R 2 and R 7, each independently of one another, represent a methyl group, and y represents integers of from 40 to 1,300. R 2 and R 7, each independently of one another, represent a methyl group, and y represents integers of from 40 to 1,300.