Note that unlike the online and printed versions, on the wall maps, the Pink and Orange Zones are titled (correctly, for my money!) with both their colours and names (Islands and Heart of Africa respectively) - the other versions just call Islands 'pink zone' and, even odder, don't say 'orange zone' for Heart of Africa.
I really hope the online versions follow suit in this change. ‘Islands’ struck me as so heavily themed and distinct from the rest of the zoo, so to label it in such a way that would make most visitors unaware of that is strange to me.