What are all the 4 letter colours?

There isn't a definitive list of "4-letter colors" because:

* Color names vary across languages and cultures. What might be a 4-letter color in one language might be longer in another.

* Color names are subjective. There's no universally agreed-upon set of color names.

However, here are some common color names with 4 letters, keeping in mind that some might be considered more "shades" than primary colors:

* Blue

* Gray

* Teal

* Rose

* Gold (though this is more of a metallic color)

* Lilac

Let me know if you have any other color questions!