[Pigments] ultramarine, smalt, cobalt, cyanogen [Chem]; Prussian
blue, syenite blue†; bice†, indigo; zaffer†.
lapis lazuli, sapphire, turquoise; indicolite†.
blueness, bluishness; bloom.
Adj. blue, azure, cerulean; sky-blue, sky-colored, sky-dyed;
cerulescent†; powder blue, bluish; atmospheric, retiring; cold.