Green has to feature strongly, as well as the many colours of blooms that grow there. Think of a rainbow and you've probably got a match.
As the Bahamas - haven for US businesmen off the coast of Florida - are further north away from the West Indies, they barely qualify as being described as 'Caribbean' islands.
The Great Bahama Bank separates the islands from Cuba, did Castro ever nurture thoughts of expanding north-eastwards, or would that have been biting off more than he could chew? Otherwise I'd have said add red to the mix.