Noun
The quality of being blue; a blue color.
Source: Webster's dictionaryhe had eyes of bright blue Source: Internet
The appearance of blue, green, and hazel eyes results from the Rayleigh scattering of light in the stroma, an optical effect similar to what accounts for the blueness of the sky. Source: Internet
Light which triggers this greenness response more than the yellowness or blueness of the other color opponent mechanism is called green. Source: Internet
Medicine * Cyanosis is an abnormal blueness of the skin, usually a sign of poor oxygen intake. Source: Internet