"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 440 to 475 nm, which belongs to short wavelength.

Blue represents beauty, calmness, rationality, tranquility and vastness.

Blue has a rational and accurate image because of its calm characteristics. In commercial design, most commodities or corporate images that emphasize technology and efficiency choose blue as the standard color and corporate color, such as computers, cars, photocopiers and photographic equipment.

In addition, blue also represents melancholy, which is influenced by western culture, and this image is also used in literary works or emotional commercial design.

Extended data

1, sky blue: the color representing the "initial" is the representative of a young creature (the mature color is green). Psychologically speaking, sky blue and pink are both "soothing colors", which are quiet and relaxed colors.

2. Lake blue: stands for "waiting". In the hint of color, it is the color of forbidden words. Usually in places full of this color, people talk less.

3. sapphire blue: sapphire blue, like purple, represents a noble feeling.

4. Peacock orchid: It means "concealing". In the field of printing, this color will have a great error with imagination. In the spiritual field, this color is unattainable in the sacred world, and it is a special color besides gold and silver.

5. Blue (true blue): It is synonymous with "melancholy". Psychologically, dark blue will give some people who are easy to accept hints a sense of oppression, but some optimistic people will feel relaxed.

6. Blue-purple: The meaning of this color is as mysterious as blueberry. In the field of beauty, this color will give people a sense of quiet temptation, and in general, this color is too inflated, giving people a sense of pride.

Baidu Encyclopedia-Blue