One of the Bronze Age frescoes found at Thera (probably 17th century BC) shows blue monkeys. The species still exists (Ethiopia is the northern end of its range)—fur is a sort of bluish-gray in color.
The Color Blue in the Ancient World
Surprisingly, the word blue is simply missing from nearly all other ancient languages. There is no distinct word for the color in Chinese, Hebrew, or Sanskrit. Rather, the color that we call blue is usually grouped in with other colors, like green.
Egyptians, however, did have a distinct word for the color blue, and not surprisingly, they were one of the only ancient peoples who had created blue dye from very early on in their history.In the history of nearly all languages, the word for blue emerged much later than other colors. Through careful examination of ancient texts, linguists have discovered that almost all languages followed a fairly standard timeline of when names for distinct colors were introduced — black and white are the most ancient colors, followed by red.
https://greekreporter.com/2021/01/01/did-the-ancient-greeks-see-blue-like-we-do/