quite interested to know if you can get a good full rainbow going:

r - red sky - pere ubu
o - the orange county lumber truck - mothers of invention
y - yellow country teeth - cyhasy
g - buckingham green - ween
b - blue boy - orange juice (double points?)
i - indigo - moloko
v - violet - hole

finish off with the rainbow by talk talk for good measure

might also sneak pink glove by pulp in just before red.

I'm keeping with my first choice, but it might be interesting to to pick a colour.
(blue is illegal, black/white is also too common and not proper colours )

here's some more red - so i might stick with red overall:

blood red bird - smog
murder in the red barn - tom waits
my lips are red - st vincent
brick is red - pixies
my left red eye - worm is green
red sky - acoustic ladyland

if acoustic ladyland is permissable, then i might get away with:
red clay - soil and pimp sessions