The Collaborative International Dictionary of English v.0.48:
Bluish \Blu"ish\, a. Somewhat blue; as, bluish veins. "Bluish mists." --Dryden. -- Blu"ish*ly, adv. -- Blu"ish*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
bluish adj 1: of the color intermediate between green and violet; having a color similar to that of a clear unclouded sky; "October's bright blue weather"- Helen Hunt Jackson; "a blue flame"; "blue haze of tobacco smoke" [syn: blue, bluish, blueish]