(art) An intense deep blue hue achieved by means of ultramarine pigment and a binder.

A chemical reaction in which an aqueous solution containing glucose, sodium hydroxide and methylene blue turns from colourless to blue upon shaking and then loses its colour after a while. With further shaking, the cycle can be repeated several times.

plural of blue light disco

plural of woodland blue phlox

plural of blue wood sedge

plural of false blue indigo

Synonym of blue-throated sapphire

Hylocharis eliciae, a hummingbird of South America with a metallic golden-green tail and blue-violet throat and a straight red black-tipped bill.

plural of nodding blue lily

Stypandra glauca, a rhizomatous perennial plant of southern Australia, with blue lily-like flowers.