| blu | blau |
| blu ardesia | schiefergrau |
| Blu Brillante FCF | Brillantblau FCF |
| Blu di bromofenolo | Bromphenolblau |
| Blu di metilene | Methylenblau |
| Blu di Prussia | Berliner Blau |
| blu marino | Marineblau |
| blu notte | dunkel-blau |
| blu oltremare | ultramarinblau |
| Blu Patentato V | Patentblau V |
| Blu profondo | Deep Blue Sea |
| blu reale | Königsblau |
| blu scuro | dunkel-blau |
| blu zaffiro | saphirblau |
| Blu-ray Disc | Blu-ray Disc |
| bluastro | bläulich |
| Bludenz | Bludenz |
| Bludesch | Bludesch |
| Blue | Blau |
| Blue Blood | BLUE BLOOD |
| Blue box | Bluebox |
| blue chips | Blue chips |
| Blue Chips - Basta Vincere | Glücksspiel |
| Blue Gene | BlueGene |
| Blue Hole | Blue Hole |
| blue jeans | Blue Jeans |
| Blue Licks State Park | Blue Licks State Park |
| Blue Marble | Blue Marble |
| Blue Mountains | Blue Mountains |
| Blue note | Blue Note |
| Blue Screen of Death | Blue Screen |
| Blue Sky Studios | Blue Sky Studios |
| Blue Springs | Blue Springs |
| Blue Steel | Avro Blue Steel |
| Blue Streak | Blue Streak |
| Blue Train | Blue Train |
| Blue Öyster Cult | Blue Öyster Cult |
| Bluebeat | Bluebeat |
| Blueberry | Leutnant Blueberry |
| Bluefish | Bluefish |
| Bluegrass | Bluegrass |
| blues | Blues |
| Blues rock | Bluesrock |
| Bluetongue | Blauzungenkrankheit |
| Bluetooth | Bluetooth |
| Bluff Dale | Bluff Dale |
| bluffare | verbergen |
| bluffatore | Schwindler |
| bluffatrice | Großsprecherin |
