I'm doing some research for a map colour scheme, and I'm wondering just how common this ah trope really is.
There are two fictional examples that are generally cited. Oceania (1984) is one, but as all the information comes from a variety of unreliable narrators, it is questionable whether that nation even extends much beyond south-east England. Assuming the party is telling the truth about the size of the country, then it would seem to be a genuine example.
The other fictional example I am aware of is the Holy Britannian Empire (Code Geass). However, the UK is never actually a part of that empire. In effect, this is more properly an example of a monarchist (and expansionist) America rather than an Anglo-American union.
Are there any other examples of this trope? Is it really deserving of having a specific colour?