The c-bill color options (just 4 of them, for 5m total) are, almost trash. it would have to at least double (to 8) or be up to 16 to be worthwhile. Basic Red, Orange, Blue, and Purple does not really combine well enough with the stock green for any useful camo. Best you could do is with Blue and Purple on virtually any mech, with small bits red and/or orange as the tertiary color.
IOW, it's not really worth it and a weak money sink (should be like 1m c-bills each in terms of cost per color IMO).
I wanted to add... the very bare camo system highlights parts of the mech to make it an easier target. So, if you can see the full mech, you can easily decypher where parts of the mech you want to shoot. The Raven's oddball hitboxes becomes easily highlighted with it (making it dreadfully obvious to others), and it is easier to take advantage of it when it overheats...
Edited by Deathlike, 10 March 2013 - 10:35 AM.