Custom Colour palettes

[Brooklin]

This is mostly something I want for a blue and Black theme I'm running but custom colour palettes would really level the customisation by a bit. 

[AnnaMaz]

Hello @Brooklin

I appreciate your feedback! Your suggestion will be forwarded to the team for further consideration.

[Moiramon]

The colour pallet for accent change is much better on pixel phones. I dislike how it changes the dialer screen.