Orange is the middle and low frequency part of visible light in electromagnetic wave, with the frequency of 480~5 10THz, and the corresponding wavelength in air is about 625~590nm. An intermediate color between red and yellow. Also called orange or orange. Orange is a lively and enthusiastic color, and it is the warmest color in the warm color system.
Extended data
When orange is slightly mixed with black or white, it will become a steady, subtle and fiery warm color, but when mixed with more black, it will become a burnt color; Adding more white to orange will bring a sweet and greasy feeling. Because it is located in the middle and low frequency band of visible light, the diffraction ability of orange in air is second only to that of red, and its color sense is warmer than that of red.
The most saturated orange should be the warmest color, which can give people a solemn, noble and mysterious feeling, so it basically belongs to psychological color. Many dignitaries and religious figures used it to decorate themselves in history, and it is often used as a symbol and propaganda color in modern society. But it is also a color that easily causes visual fatigue.