Wiktionary
cadet blue
a. Of a blue colour, tinted with grey. n. A blue colour, tinted with grey.
Usage examples of "cadet blue".
In the end she settled on a long hunter green skirt and a white knit top that she covered with a cadet blue silk shirt.
Low, rounded lamps a foot or two high, looking like blue mushrooms, rimmed the edge of the water, connected b\ chains painted the same cadet blue.