Middle French bleu

← Old English blāw (cognate)

← German blau (cognate)

← English blue (link)

← Old French bloe (inherited)

← Old French bleve (mention)

← Old French blef (mention)

← Proto-Germanic *blēwaz (derived)

← Old High German blāo (cognate)

← Proto-Indo-European *bʰleh₁- (derived)

← Proto-Indo-European *bʰel- (mention)

← Dutch blauw (cognate)

→ French bleu (inherited)

→ Italian blu (derived)