What Color Did Ancient Greeks Call Cloudless Sky?

Question

The nearest words, blaukos and kyanos, are more like expressions of relative light intensity or darkness but
less apt to describe color. Clue: What colors did Greek
Poet named Homer include in his Iliad and the Odyssey?
Aristotle denoted seven shades of brightness he thought
all derived from black and white. It is thought early Greeks
grouped objects in terms of qualities other than color. On
our planet today are cultures who have no expressions for colors.

Answer 1

γαλάζιος (galazios, "azure").

Answer 2

Waaaaay too early for me. Let me sleep on it and I'll think of something later.