köken: Inherited from Middle French bleu, from Old French blöe, bleve, blef, bleu (“blue”), from Late Latin blāvus, from Frankish *blāu (“blue”), from Proto-Germanic *blēwaz (“blue”), from Proto-Indo-European *bʰléh₁-, *bʰlh₁-, *bʰleh₁- (“yellow, grey, blue”), from Proto-Indo-European *bʰel- (“to shine”). Cognate with Old High German blāo (“blue”) (German blau), Dutch blauw (“blue”), Old English blāw…