Having more colour for our sim hairs

This idea just popped into my head after the skin and makeup update, what if they done something like this for hairs ?, I'm guessing were not going too get an actual colour wheel but I believe this could be the next best thing, we have black, 2 shades of brown, 2 shades of blonde, 2 shades of red hair and of course unnatural hair colours such as pink, green, bright red l, blue etc, what if you can create purple from pink, turquoise from green etc, with bright red we could have black with red in it and with blue hair add more black, and of course change the more natural colours too a different shade of it, like a lighter blonde too darker blonde

Edit: I was also thinking from white we could get lavender coloured hair, pastels colours