When you are using individual colours to paint your car in GT 7 / GT Sport, you are facing two problems. You need to calculate from an HEX or RGB colour code to the HSV code, which is used in GT 7 / GT Sport. Secondly the moment you are leaving the colour menu, you loose all your colour figures.

GT Color is not only doing the math for you, but also you can store your colours! On top of that, you even can store your colours under a car name or a paint scheme.
GT Color supports split screen on iPad!

Enjoy to individualise your cars in GT Sport! Then let's race!