| Part of speech | adjective |
|---|
| Albanian | kaltër |
|---|---|
| Catalan | blau |
| Czech | modrý; modř |
| Dutch | blauw |
| English | blue |
| English (Old English) | blew; blu |
| Esperanto | blua |
| Faeroese | bláur |
| Finnish | sininen |
| French | bleu |
| German | blau |
| Greek | γαλάζιος; γαλανός |
| Hungarian | kék |
| Icelandic | blár |
| Italian | azzurro; blu |
| Kabylian | azerwal |
| Low German | blauw |
| Luxemburgish | blo |
| Malay | biru |
| Norwegian | blå |
| Papiamento | blou |
| Portuguese | azul |
| Romanian | albastru |
| Russian | синий |
| Saterland Frisian | blau |
| Scots | blue |
| Scottish Gaelic | gorm |
| Spanish | azul |
| Swedish | blå |
| Tagalog | asúl; bugháw |
| Thai | สีน้ำเงิน; เขียว; ฟ้า |
| Turkish | mavi |
| West Frisian | blau |
| Yiddish | בלאָ; בלױ |