blau

German, adjective

blau is spelled B-L-A-U (4 letters) and appears 45 times per million words in written German, the 1,885th most frequent German word form (wordfreq, 2021 data). Blau is a German adjective meaning “blue (color/colour)” (English Wiktionary, September 2026). With a capital, Blau is a different word: “the colour blue (as a whole)”. The German Wiktionary defines it as “eine bunte Farbe, im Spektrum eine relativ kurzwellige Farbe zwischen grün und violett; Grundfarbe vieler…”.

What does blau mean in English?

adjective

1
blue (color/colour)
2
colloquialdrunk
3
bruised
blauer Fleck
4
poached without being descaled

noun

as Blau

1
neuterthe colour blue (as a whole)
2
neutera particular tone of blue
3
neuterazure; blue in heraldry
4
neuterthe sky
5
neuterthe sea

Source: English Wiktionary, German section, dump of September 2, 2026 (CC BY-SA 4.0).

How German dictionaries define it

adjective: 1. eine bunte Farbe, im Spektrum eine relativ kurzwellige Farbe zwischen grün und violett; Grundfarbe vieler Farbmodelle, insbesondere eine der drei Grundfarben des digitalen RGB-Farbraums 2. betrunken 3. zyanotisch, bläuliche Färbung der Haut, wenn sie mit zu wenig sauerstoffreichem Blut versorgt wird 4. indekliniertes Adjektiv, nur attributiv dem Substantiv nachgestellt: Zubereitungsart von Fisch

noun: 1. blauer Farbton, ein bestimmter Abschnitt des sichtbaren Lichts im Spektrum der elektromagnetischen Wellen, Malfarbe, Streichfarbe

The definition in the German Wiktionary, in German.

Source: German Wiktionary, dump of September 1, 2026 (CC BY-SA 4.0), through kaikki.org.

Forms of blau

blauer masculine nominative singular
am blauesten superlative
am blausten superlative
blaue feminine nominative singular
blaues neuter nominative singular
blauen genitive masculine singular
blauem dative masculine singular
der blaue definite includes-article masculine
die blaue definite feminine includes-article
das blaue definite includes-article neuter
die blauen definite includes-article nominative
des blauen definite genitive includes-article
der blauen definite feminine genitive
dem blauen dative definite includes-article
bl. abbreviation
Blaus nominative plural

Source: English Wiktionary and German Wiktionary (dumps of September 2, 2026 and September 1, 2026).

English words that translate to blau

Source: the translation tables of the English Wiktionary, dump of September 2, 2026.

How common is blau in German?

blau appears 45 times per million words in written German.

blau0.0010.010.11101001,00010,000

rarerper million words of written Germanmore common

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).