sky-blue
1. [ adjective ] (color) of a deep somewhat purplish blue color similar to that of a clear October sky
Synonyms: bright_blue cerulean azure
Examples:

"October's bright blue weather"

Related terms: chromatic
2. [ noun ] (color) a light shade of blue
Synonyms: cerulean sapphire lazuline azure
Related terms: blue azure
Similar spelling:   ski-plane