say it: BLOO-nuhs
blueness is a noun meaning "blue color or pigment; resembling the color of the clear sky in the daytime". It carries one recorded sense.
blue color or pigment; resembling the color of the clear sky in the daytime
“he had eyes of bright blue”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for blueness come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.