What is the difference between ink blue and blue black?

Blue-black means that the main color is black, but a little bluish; ink-blue-black-blue means that the main color is blue, but a little black. The one that is darker is blue-black, and the one that is bluer is black-blue.

Ink blue:

Blue black

Blue is a color. It is one of the three primary colors of red, green and blue light. Among these three Among the primary colors, it has the shortest wavelength, 440 to 475n nanometers, which is a short wavelength. Blue is a symbol of eternity, and there are many types of blue, each of which represents a different political or other meaning. In addition, there are many examples of music, books, and stars named after blue.

Due to the Rayleigh scattering of sunlight by dust in the air, the sky on a clear day is blue. Large amounts of water concentrated together appear blue due to the absorption of light at about 750 nanometers by the hydrogen-oxygen bonds in water molecules. Interestingly, heavy water is colorless because the deuterium-oxygen bond absorbs light at longer wavelengths (about 950 nanometers).

It is the coldest color. Blue is very pure and is often associated with the ocean, sky, water, and the universe. Pure blue shows a kind of beauty, calmness, reason, serenity and vastness.

Due to the calm characteristics of blue, it has a rational and accurate image. In commercial design, most products or corporate images that emphasize technology and efficiency use blue as the standard color and corporate color, such as computers, Cars, photocopiers, photographic equipment, etc.; in addition, blue also represents melancholy, which is influenced by Western culture. This image is also used in literary works or commercial designs with emotional appeals.

In many countries the police uniform is blue. Police and ambulance lights are generally blue. Because blue has the meaning of courage, calmness, reason, and never giving up. Many Air Force and Navy uniforms are blue. Generally, the air force is sky blue and the navy is sea blue.

Reference materials: Baidu Encyclopedia.

blue