Disclosed is color base composition for coloring keratin fibers comprising: at least two latex polymers independently selected from acrylate latex polymers and polyurethane latex polymers; at least one alkalizing agent; at least one oxidative dye precursor; at least one organic solvent; and water; wherein the at least two latex polymers are partially or fully neutralized; and wherein the at least two latex polymers are present in a combined amount ranging from about 0.2% to about 2.5% by weight, relative to the weight of the composition.