Colour sliders for hair

We've got quite a bit of skin tone choice now, but a lot less hair colour choice. It would be great to have sliders and be able to choose any colour we like. Having two-tone hair with two sliders would be cool too, so we can have dyed sections of hair. I think TS4 CAS is great - but we could do a lot more with hair colour options. Hair does come in all colours, natural and dyed, and we don't have that in game at the moment.

Just a quick note, I'd still like pre-textured hairs to be possible and work in-game, there's so many out there already made, and sometimes it's the only way to get all the details needed. But adding colour slider hairs as well would give us the benefits of both options.