Meaning

noun blue color or pigment; resembling the color of the clear sky in the daytime

noun blue clothing

noun any organization or party whose uniforms or badges are blue

originFrom Middle English blew, blewe, from Anglo-Norman blew, from Middle French bleu, from Old French blöe, bleve, blef (“blue”), from Frankish *blāu (“blue”) (perhaps through a Late Latin blāvus, blāvius (“blue”) attested from Isidore of Seville), from Proto-Germanic *blēwaz (“blue, dark blue”), from Proto-Indo-European *bʰlēw- (“yellow, blond, grey”). Cognate with dialectal English blow (“blue”),…

Etymology from Wiktionary, CC BY-SA 3.0