No idea about Georgian but that's not unusual - for example English didn't have color for orange for a long time. That's why you say "red hair" even though the color is orange.

While English did not have a dedicated word for "orange" there are many examples in older English texts where there was written "red-yellow" or "yellow-red" in the places where modern English would use "orange".

So the color was recognized, even if it did not have a special name.