azure vs midnight blue

azure

• In blazon, of the colour blue. 

• sky blue; resembling the clear blue colour of the unclouded sky 

• cloudless 

• The clear blue colour of the sky; also, a pigment or dye of this colour. 

• The unclouded sky; the blue vault above. 

• azure 

• azure (heraldry) 

• Any of various widely distributed lycaenid butterflies of the genus Celastrina. 

• Lapis lazuli. 

• Any of various Australasian lycaenid butterflies of the genus Ogyris. 

• A blue colour on a coat of arms, represented in engraving by horizontal parallel lines. 

• To colour blue. 

midnight blue

• of a dark blue colour, almost black. 

• a dark blue colour, almost black.