A blue colour on a coat of arms, represented in engraving by horizontal parallel lines.
The clear blue colour of the sky; also, a pigment or dye of this colour.
The unclouded sky; the blue vault above.
Any of various widely distributed lycaenid butterflies of the genus Celastrina.
Any of various Australasian lycaenid butterflies of the genus Ogyris.
Lapis lazuli.
To colour blue.