Banana boy would say yellow, Jock would say blue or red, Tiger (if he hasn't been consumed by a Thylacine) would say orange or pink, (it's the new black!) and Climbo would probably suggest black. White with silk-screened roses? Flat black? Desert camo? I'd probably go with blue, as an obscure nod to an equally obscure children's book writer named Leonard Kessler.