Classification of blue

Deep blue, sky blue, sky blue, sky blue, Alice blue, cornflower blue, tannin, dodger blue, indigo, international Qilian blue, lavender blue, midnight blue, navy blue, Changchun blue, Persian blue, pink blue, Prussian blue, sapphire blue, sapphire blue, steel blue, ultramarine blue, light blue, lake blue, etc. Blue is a color, one of the three primary colors of red, green and blue, with the shortest wavelength among the three primary colors.

Deep blue, sky blue, sky blue, sky blue, Alice blue, cornflower blue, tannin, dodger blue, indigo, international Qilian blue, lavender blue, midnight blue, navy blue, Changchun blue, Persian blue, pink blue, Prussian blue, sapphire blue, sapphire blue, steel blue, ultramarine blue, light blue, lake blue, etc.

Blue is a color, one of the three primary colors of red, green and blue. Among the three primary colors, its wavelength is the shortest, ranging from 450 to 450 to 500 nm, which belongs to short wavelength. Because sunlight is Rayleigh scattered by dust in the air, the clear sky is blue. Due to the absorption of light of about 750 nanometers by hydrogen-oxygen bonds in water molecules, a large amount of water is concentrated into blue. Interestingly, heavy water is colorless because deuterium-oxygen bonds absorb light with a relatively long wavelength (about 950 nm). The complementary color of blue is orange. The contrast color of blue is orange. The adjacent colors of blue are green and purple.