That's not an example of extreme weirdness; not only do different languages countries have different colors (international traffic conventions require that navigation signs be a pure green -- and define two, one use AFAIK only in Japan), those colors change over time. Remember the "wine dark sea?" British Prime Minister Gladstone, of all people, analyzed (before going into politics) why this was not metaphorical but actually how color was perceived (best reference I can find at this moment: https://www.businessinsider.com.au/what-is-blue-and-how-do-w...)
Politics plays a role in color selection: we have 8 colors in the English rainbow (red, orange, yellow, green, blue, indigo, violet) because Newton insisted there must be eight for mystical reasons, who really uses indigo? Really most English speakers see six, the primaries taught in school.
And lets not get into the politics of language itself.
(My grandfather was named Gladstone, surely after the PM. He was born in the bush in South Australia so I'm pretty certain that the PM's early work on Greek had no influence on the choice)