Stephen Anderson and Karl Fast in Figure It Out: Getting from Information to Understanding:
All cultures start with the ability to distinguish dark things from light things. This is followed by the recognition of red. After that, it might be the addition of yellow or green. And blue always seems to come last. Not every language follows the exact same path, but they adhere to this same general pattern.
One of the many odd things of the Vietnamese language is that both “blue” and “green” are “màu xanh”. In case you need to differentiate between the two you would add something like “of the sky” (màu xanh da trời) or “of the tree” (màu xanh lá cây).
I had one Vietnamese teacher that would mark the traffic light with “blue light” and the Korean presidential offices with “green house”.