The following types are common:
Common types of blue: ultramarine, universal blue, cobalt blue, lake blue, indigo, turquoise blue, azure blue, bold blue, navy blue, diaphanous blue, peacock blue, sky blue, dark blue, Light blue, tile blue, ice blue, aqua blue, blue-black, gemstone blue, sharp blue, blue-green, blue powder, white blue, aquamarine, dark blue, light blue, ghost blue, azure blue, light blue.
The sky is blue on a clear day due to Rayleigh scattering of daylight by airborne dust. Large quantities of water are concentrated blue due to the absorption of light at about 750 nanometers by hydrogen-oxygen bonds in water molecules, and heavy water is colorless due to deuterium-oxygen bonds that absorb light at longer wavelengths (about 950 nanometers).
Blue's complementary color in the traditional RYB color model is orange.
Related Uses and Symbolism of the Color Blue
1. Some natural scenes are blue, such as the sea and the sky, which give people a soft and comfortable feeling.
2. It is the color of the sky, symbolizing emptiness, infinity as well as the sacred.
3, because it is the color of the sky in the daytime, so it will make people have the spirit (let the brain mistakenly think that it is in the daytime, should be refreshed), should be avoided at night, many home appliances use the blue LED to do the instructions, in fact, it is a violation of ergonomics.
4. In many countries, police uniforms are blue. Police and ambulance lights are usually blue, which tends to calm people down. Therefore the color blue sometimes means first aid.
5, blue is used as a hint, instruction in the marking color standard.
6, blue pen for writing.
7, many air force and navy uniforms are blue. Generally the air force is sky blue and the navy is navy blue.
8, blue collar generally refers to workers in factories who do manual labor. This designation comes from the blue coveralls that workers wear when they work. The opposite of this is white collar, which generally refers to staff in the office, who generally wear white shirts.