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Webster 1913 Edition

Noun.

The quality of being blue; a blue color.

Boyle.

Noun.

The quality of being blue; a blue color.

blueness ‎(usually uncountable, plural bluenesses)

The state or quality of being blue.
- 1905, H. G. Wells, Empire of the Ants
  In an atlas, too, the land is man's, and all coloured to show his claim to it — in vivid contrast to the universal independent blueness of the sea.

state or quality of being blue