examples: https://en.wikipedia.org/wiki/Shades_of_white#:~:text=Ivory,-Main%20article:%20Ivory&text=Ivory%20is%20an%20off%2Dwhite,in%20English%20was%20in%201385.&text=The%20color%20ivory%20was%20included,they%20were%20formulated%20in%201987.