ETYM French and Old Span. azur, Spanish azul, through Arabic from Per. lâjaward, or lâjuward, lapis lazuli, a blue color, lâjawardî, lâjuwardî, azure, cerulean.
Of a deep somewhat purplish blue color similar to that of a clear October sky; SYN. cerulean, sky-blue, bright blue.

A light shade of blue; SYN. cerulean, sapphire, lazuline, sky-blue.

To color azure