Related: The Wine-Dark Sea: Color and Perception in the Ancient World by Erin Hoffman [1]. Extract:
"We may never know for sure, but one peculiar fact casts the mystery in an interesting light: there is no word for “blue” in ancient Greek. Homer’s descriptions of color in The Iliad and The Odyssey, taken literally, paint an almost psychedelic landscape: in addition to the sea, sheep were also the color of wine; honey was green, as were the fear-filled faces of men; and the sky is often described as bronze."
Edit: Interestingly, Russian appears not to have a single word for blue [1]. Instead, light blue and dark blue are thought of as separate colours.