- Acehnese: belau
- Afrikaans: blou (af)
- Akan: bibir, bruu
- Albanian: kaltër (sq) (light blue), blu (sq)
- Amharic: ሰማያዊ (sämayawi)
- Apache:
- Western Apache: dotłʼizhihíí
- Arabic: أَزْرَق (ar) m (ʔazraq), زَرْقَاء f (zarqāʔ), زُرْق pl (zurq)
- Egyptian Arabic: أزرق m (ʔazraʔ), زرقا f (zarʔa)
- Gulf Arabic: أزرگ m (ʔazrag), زَرْگَا f (zarga)
- Hijazi Arabic: أزرق m (ʔazrag), زرقا f (zarga)
- Moroccan Arabic: زرق m (zraq), زرقا f (zarqa)
- Aragonese: azul
- Armenian: կապույտ (hy) (kapuyt)
- Aromanian: njirlu (roa-rup), yalan, albastru, cucav
- Assamese: নীলা (nila)
- Assyrian Neo-Aramaic: ܙܪܘܿܩܵܐ m (zrōqā), ܙܪܘܿܩܬܵܐ f (zrōqtā), ܡܝܼܠܵܐ (mīlā)
- Asturian: azul (ast)
- Aymara: larama (ay)
- Azerbaijani: göy (az), mavi (az)
- Bashkir: күк (kük)
- Basque: urdin (eu)
- Belarusian: (navy blue) сі́ні (be) (síni), (sky blue) блакі́тны (blakítny)
- Bengali: নীল (bn) (nil)
- Bislama: blu
- Breton: glas (br)
- Bulgarian: син (bg) (sin)
- Burmese: အပြာ (my) (a.pra), ပြာ (my) (pra)
- Buryat: хүхэ (xüxe)
- Catalan: blau (ca)
- Cebuano: bughaw, asul
- Chagatai: کُوکْ (kȫk)
- Chechen: сийна (siı̇na)
- Cherokee: ᏌᎪᏂᎨᎢ (sagonigei)
- Chickasaw: okchamali'
- Chinese:
- Cantonese: 藍色嘅 / 蓝色嘅 (laam4 sik1 ge3), 藍 / 蓝 (laam4)
- Hokkien: 藍色 / 蓝色 (zh-min-nan) (nâ-sek)
- Mandarin: 藍色 / 蓝色 (zh) (lánsè), 藍 / 蓝 (zh) (lán)
- Chuvash: кӑвак (kăvak)
- Coptic: ⲁⲥⲓⲗⲱⲛ (asilōn)
- Corsican: turchinu (co)
- Crimean Tatar: mavı
- Czech: modrý (cs)
- Danish: blå (da)
- Dhivehi: ނޫ n (nū)
- Dutch: blauw (nl)
- Dzongkha: ཧོནམོ། (honmo)
- Erzya: сэнь (seń)
- Esperanto: blua (eo)
- Estonian: sinine (et)
- Even: чулбаня (culʙaņa)
- Evenki: чулама (çulama)
- Farefare: sab-puko
- Faroese: bláur (fo) m, blá f, blátt (fo)
- Finnish: sininen (fi)
- French: bleu (fr)
- Galician: azul (gl)
- Gallurese: biaittu
- Georgian: ლურჯი (ka) (lurǯi), ცისფერი (cisperi)
- German: blau (de)
- Alemannic German: blaaw
- Gilbertese: mawaawa
- Greek: μπλε (el) (ble)
- Ancient: κυάνεος (kuáneos)
- Greenlandic: tungujortoq (kl)
- Haitian Creole: ble
- Hawaiian: uliuli
- Hebrew: (dark blue) כָּחוֹל (he) m (kaḥól), כְּחוּלָה (he) f (kḥulá), (sky blue) תְּכֵלֶת (he) f (tchélet)
- Hindi: नीला (hi) m (nīlā), नीली (hi) f (nīlī)
- Hmong Dô: xiav
- Hopi: sakwa
- Hungarian: kék (hu)
- Hunsrik: blau
- Icelandic: blár (is)
- Ido: blua (io)
- Igbo: alulu
- Indonesian: biru (id)
- Ingrian: siniin
- Interlingua: blau (ia)
- Irish: gorm (ga)
- Italian: (dark blue) blu (it), (sky blue) azzurro (it)
- Japanese: 青い (ja) (あおい, aoi), 青の (ja) (あおの, ao no)
- Javanese: biru (jv) (krama-ngoko)
- Kannada: ನೀಲಿ (kn) (nīli)
- Kapampangan: iro, mairo, mayiro
- Kaurna: kardalta
- Kazakh: көк (kk) (kök)
- Khakas: кӧк
- Khmer: ខៀវ (km) (khiəw)
- Kongo: bule
- Korean: 푸르다 (ko) (pureuda), 파랗다 (ko) (parata)
- Kurdish:
- Central Kurdish: شین (ckb) (şîn)
- Northern Kurdish: şîn (ku)
- Kyrgyz: көк (ky) (kök), көгүш (ky) (kögüş), көгүлтүр (ky) (kögültür), бачабас (ky) (bacabas)
- Ladakhi: སྔོན་པོ (sngon po)
- Ladino: mavi, blu, blö
- Lao: ຟ້າ (fā), ນ້ຳເງິນ (nam ngœn)
- Latgalian: zyls m
- Latin: blavus (LL.); azurinus (lapis, ML.); caeruleus (la), caerulus (sky blue); venetus (sea blue); cyaneus (cyan); glaucus (la) (blue-gray); lividus (la) (dark blue)
- Latvian: zils (lv)
- Limburgish: blauw (li)
- Lingala: bozinga
- Lithuanian: mėlynas (lt)
- Livonian: siņņi
- Louisiana Creole French: blé, ble
- Low German:
- Dutch Low Saxon: blauw (nds)
- German Low German: blaag, blau (nds), blo' (nds) (Vest Recklinghausen), blao (nds) (Münsterland)
- Luxembourgish: blo (lb)
- Macedonian: син (mk) (sin), плав (plav), модар (modar)
- Malagasy: manga (mg)
- Malay: biru (ms), belau (ms)
- Malayalam: നീല (ml) (nīla)
- Maltese: blu (mt); (dated for specific tones) ikħal, iżraq
- Manchu: ᠯᠠᠮᡠᠨ (lamun)
- Manx: gorrym
- Maori: kahurangi (mi), kikorangi (mi), purū, ōrangi, ōrangiuri (dark blue)
- Mapudungun: kallfü
- Marathi: निळा (mr) (niḷā)
- Mizo: dumpäwl
- Moksha: сенем (śeńem)
- Mongolian: цэнхэр (mn) (cenxer), хөх (mn) (xöx)
- Nahuatl: texohtic (nah)
- Nama: ǂkhoā
- Navajo: dootłʼizh
- Nepali: नीलो (ne) (nīlo)
- Ngazidja Comorian: -a bile
- Nogai: коьк (kök)
- North Frisian:
- Föhr: blä
- Hallig: weeden
- Mooring: ween
- Wiedingharde: wjin
- Northern Ohlone: nese
- Northern Sami: alit
- Norwegian: blå (no)
- O'odham: anilhmagi
- Occitan: blau (oc)
- Ojibwe: ozhaawashko-, (inanimate verb, "it is blue") ozhaawashkwaa, (animate verb, "he/she/it is blue") ozhaawashkozi
- Old English: hǣwen, bleo
- Old Frisian: blāu, blāw
- Old High German: blāo
- Old Javanese: biru
- Old Saxon: blāo, blāu
- Old Turkic: 𐰚𐰇𐰚 (kük /kȫk/)
- Ossetian: цъӕх (c’æx)
- Palauan: mellemáu
- Papiamentu: blou
- Pashto: شين (ps) (šín), شنه (ps) (šna)
- Pennsylvania German: bloh
- Persian: آبی (fa) f (âbi), کبود (fa) (kabud)
- Plautdietsch: bleiw
- Polish: niebieski (pl), błękitny (pl) (sky blue)
- Portuguese: azul (pt), azulado (pt)
- Potawatomi: wicapwak
- Punjabi: ਨੀਲਾ m (nīlā), ਨੀਲੀ f (nīlī), ਨੀਲੇ m pl (nīle), ਨੀਲੀਆਂ f pl (nīlīā̃)
- Quechua: anqas (qu)
- Romanian: albastru (ro), azuriu (ro)
- Romansch: blau (Rumantsch Grischun, Sursilvan, Sutsilvan, Vallader), blo (Sutsilvan, Surmiran), blov (Puter)
- Russian: (navy blue): си́ний (ru) (sínij), (sky blue): голубо́й (ru) (golubój)
- Sanskrit: नील (sa) (nīla)
- Sardinian:
- Campidanese: asùlu, blàu
- Logudorese: asùlu, blàu, biaittu
- Sassarese: biaittu
- Saterland Frisian: blau
- Scottish Gaelic: gorm, (pale or bright) liath
- Serbo-Croatian:
- Cyrillic: плав, модар
- Roman: plav (sh), modar (sh)
- Shona: bhuluu
- Shor: кӧк
- Sicilian: azzolu (scn), arzolu (scn), blu (scn)
- Silesian: modry
- Sinhalese: නිල් (si) (nil)
- Skolt Sami: ââˊliǩ
- Slovak: modrý (sk)
- Slovene: moder (sl) m
- Somali: buluug (so)
- Sorbian:
- Lower Sorbian: módry
- Upper Sorbian: módry
- Sotho: tala (st), setala (st)
- Southern Altai: кӧк (kök)
- Southern Sami: plaave
- Spanish: azul (es), (light blue) celeste (es), blao (es)
- Sranan Tongo: blaw
- Sudovian: gālimbias
- Sundanese: bulao (su)
- Svan: ჲჷრჟი (yərži) (navy blue), დეცე ფერიშ (dece periš) (light blue)
- Swahili: buluu (sw) (noun), bluu (sw) (noun)
- Swazi: bulâ
- Swedish: blå (sv)
- Tagalog: bughaw (tl), asul (tl)
- Tajik: кабуд (tg) (kabud), обӣ (tg) (obi), нилобӣ (nilobi)
- Talysh: kavu
- Tamil: நீலம் (ta) (nīlam)
- Tarifit: azegzaw m, aziza m
- Tat: kour
- Tatar: зәңгәр (zäñgär)
- Telugu: నీలము (te) (nīlamu)
- Thai: น้ำเงิน (th) (nám-ngən), ฟ้า (th) (fáa) (sky blue)
- Tibetan: སྔོན་པོ (sngon po)
- Tigrinya: ሰማያዊ (sämayawi)
- Tocharian B: tseṃ
- Tok Pisin: blu, blupela
- Tongan: lanu-moana
- Turkish: mavi (tr), gökçe (tr)
- Turkmen: gök
- Tuvaluan: pulú
- Tuvan: көк (kök)
- Udmurt: лыз (lyz)
- Ukrainian: (navy blue) си́ній (uk) (sýnij), (sky blue) блаки́тний (uk) (blakýtnyj), голубий (uk) (holubyj), лазурний (lazurnyj)
- Urdu: نیلا m (nīlā), نیلی f (nīlī)
- Uyghur: كۆك (ug) (kök)
- Uzbek: koʻk (uz), moviy (uz), gʻamgin (uz) (colloquial)
- Vietnamese: (màu) xanh (blue or green), xanh lam, màu xanh nước biển
- Vilamovian: błöw
- Volapük: blövik (vo), (older term) yulibik
- Voro: sinine
- Votic: sinin
- Welsh: glas (cy)
- West Frisian: blau (fy)
- White Hmong: xiav
- Winnebago: coo
- Wolof: baxa (wo)
- Xhosa: luhlaza
- Yagnobi: кабут (kabut)
- Yakut: күөх (küöq)
- Yao: òfáfeàwò
- Yiddish: בלאָ (blo)
- Yoruba: àwo búlúù, àwo òrun
- Zazaki: kebud
- Zulu: -luhlaza
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