That map vastly underestimates british rule in indiaI mean they've been used in maps before, like all the maps on the Wikipedia page for colonization use those same colors for the 4 major colonizers. Not sure where they've been before that.
I don't care at all which colors are used for which countries per se, but I do care that major colonizers and typical neighbors must use different colors from each other. Some of these are bad enough already (Hungary/PLC occupations on each other are very hard for me to see), we definitely don't need Portugal and France to have the same color. The whole point of political map mode colors is being able to tell who owns things.