Need paint ideas

[Rc 415]

I need ideas for painting my truck, I can not decide on a color at all, and I think I want a 2 tone job, I was thinking red fading to yellow with orange in between, like on the trailer behind this truck:

Heres the catch though, I can only afford to get the truck painted a solid color at this point, is it even possible to get the second color put on later?

the yellow would have to be really bright like on this truck:


and the 2 tone I wouldnt really want a standard at the body line split, something like this maybe:

or

There are just so many options I cant decide!!!!!