I suppose there's a light 'n' dark shade on that car.
So, supposing that, you'll use different types of purple and blue, bright purple for the top, a mix of purple and blue for the mid part, and blue for the bottom (or lower part).
View attachment 198
(following basic shading rules i know when drawing)
If not... i don't know honestly, i ain't a livery god, i'm just a silly lil dude who likes this silly game :3