Still... *** boots. Why did they change from primary colour dependent to secondary?
I'm thinking that's because "unify colors" can have a different palette for each slot -based on the set the chest is from-, instead of one being applied globally. Dye modules cause unify to use the same 2 colors for every piece.
This is probably why you get some 'weird' stuff... like the saberist armor causing gloves and boots to turn red even though it's fully gray. Or the trailblazer set having a black/gray chest piece that makes pants go red/gray with unify colors.