Color protectant compositions

A composition comprising a cationic polyurethane, wherein the cationic polyurethane is formed from W, V, Y, Z, and X,

• wherein
• W is a polycarbonate diol with molecular weight of 1,000 g/mol (PCD1K) or a polycarbonate diol with molecular weight of 3,000 g/mol (PCD3K);
• V is isophorone diisocyanate (IPDI);
• Y is 1,4-butanediol (BD);
• Z is 3-(dimethylamino)-1,2-propanediol (DMAPD);
• X is lactic acid;
• the molar ratio of V to W is 1:0.30, 1:0.29, 1:0.28, 1:0.20, or 1:0.10;
• the molar ratio of V to Y is 1:0.78, 1:0.61, 1:0.60, 1:0.58, 1:0.56, 1:0.51, 1:0.42, 1:0.41, 1:0.27, or 1:0.26;
• and
• the molar ratio of V to Z is 1:0.45, 1:0.44, 1:0.38, 1:0.30, 1:0.25, 1:0.22, 1:0.21, 1:0.16, or 1:0.12.