Hi Dave, by hues, I'm talking about the different kinds of blue you're using. The top part of the car is more of a cerulean blue >>>>
but the color you used for the bottom half is more of a purple-ish blue.
I'm not referring to the shades (light/dark) of blue you're using - the high contrast look you've got going on with this one is great!
I hope I'm helping you and not offending you!
Take care.
Alex