There are many kinds of blue, which can almost be divided into the following categories:

Ultramarine, plain blue, cobalt blue, lake blue, indigo, azure, cerulean blue, sapphire blue, navy blue, indigo Blue, peacock blue, sky blue, dark blue, light blue, tile blue, ice blue, aqua blue, blue black, sapphire blue, sharp blue, blue green, blue pink, white blue, sea blue, dark blue, light blue, dark blue, azure blue , Light blue

1. Ultramarine blue

Ultramarine blue pigment is the oldest and most vivid blue pigment. It is non-toxic, environmentally friendly and belongs to the category of inorganic pigments.

It is used for whitening and can eliminate the yellow light in white paint or other white pigments. It is insoluble in water, alkali-resistant, and high-temperature resistant. It is extremely stable against sunlight and wind and rain erosion in the atmosphere, but it is not Acid resistant, decomposes and changes color when exposed to acid.

2. Cobalt blue

Cobalt blue refers to a bright and clear blue pigment. The main color of cobalt blue is similar to ultramarine blue, but its undertone is purplish. Ultramarine blue undertones appear greener in comparison. Other early names for cobalt blue were Olympia blue, Vienna blue or Vienna ultramarine.

3. Lake blue

Lake blue is a deep blue similar to sapphire, a color between blue and green. Lake blue is a cool color, giving people calmness and exuding reason. Lake blue design represents the rationality of design. Pure lake blue contains innovation, and it is innovation that gives us motivation.

4. Indigo

Indigo, also known as Food Blue No. 1, Edible Cyan No. 2, Edible Blue, Acid Indigo, Hardened Indigo, is a water-soluble non-azo colorant. Indigo pigments are one of the oldest pigments known to mankind and are widely used in food, medicine and printing and dyeing industries.

5. Peacock Blue

Peacock blue is one of the glaze colors of porcelain. "Peacock blue glaze" is also called "French blue". It is named after the glaze color of porcelain. Peacock blue porcelain is made of copper. The element is a colorant, and after firing, it appears as a low-temperature glaze with a bright blue hue.

Extended information:

Blue is a color. It is one of the three primary colors of red, green and blue light. Among these three primary colors, its wavelength is the shortest, 440 ~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).

The contrasting color of blue is orange, the complementary color of blue is yellow, the couple color of blue is red, and the adjacent colors of blue are cyan and magenta.

Reference materials:

Baidu Encyclopedia-Blue