sims 4 hair cc won't change color?

what the title says. when i have a hair color selected on a cc it won't change unless i change the default hair color. I just want some hair colors specific to certain outfits. maybe i'm dumb, and this isn't possible, but everyone online says that you can get hair colors specific to outfits so long as you use a cc hair. if anyone has any solutions, please help me out here! thank you!