Caligula looks to be on point based on the restoration of his original colors in that article.
To your second point, that reminded me that Japan's traffic signals use a different color "green" (looks more blueish) than the rest of the world and they have a common, named color that doesn't really map to blue or green in the rest of the world: https://en.wikipedia.org/wiki/Ao_(color)
Caligula looks to be on point based on the restoration of his original colors in that article.
To your second point, that reminded me that Japan's traffic signals use a different color "green" (looks more blueish) than the rest of the world and they have a common, named color that doesn't really map to blue or green in the rest of the world: https://en.wikipedia.org/wiki/Ao_(color)