Here are two other coat color names that, like blue, aren’t meant to be taken quite literally. Lilac, which has also been called “lavender,” is basically a beige-gray or a light brown-gray but is distinctive in having (barely) a hint of pinkish purple. (The colors purple and brown are not that different, as any artist would tell you.)
“Apricot” is a cream color that (again, barely) has a hint of orange-red. Neither lilac nor apricot seems to occur in nature; they are the result of selective breeding.