Jisho

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Noun, No-adjective
1. blue; azure
2. greenmostly in compound words and in ref. to fruits, plants and traffic lights
Noun
3. green light (traffic)Abbreviation, See also 青信号
4. black (horse coat color)See also 青毛
Prefix
5. immature; unripe; young
Wikipedia definition
6. BlueBlue is a colour, the perception of which is evoked by light having a spectrum dominated by energy with a wavelength of roughly 450–490 nm. It is considered one of the additive primary colours. On the HSV Colour Wheel, the complement of blue is yellow; that is, a colour corresponding to an equal mixture of red and green light.
Read “Blue” on English Wikipedia
Read “青” on Japanese Wikipedia
Read “Blue” on DBpedia
Other forms
蒼 【あお】碧 【あお】

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