Well my initial thought was for a more complementary/less contrasting colour than the blue (red/brown/orange etc), but the marking idea has merit...
Yeah, truly beautiful colours. Fantastic stuff.
Looks amazing though I have to say the shield doesn't quite contrast with it very well imo.
Itzaurians.
Those look awesome. I like how you opted for the TW design but put your own twist on them. Really good stuff.