Chinese culture attaches certain values to colors, like which colors are considered auspicious (吉利) or inauspicious (不利). The Chinese word for 'color' is yánsè (顏色). In Literary Chinese, the character 色 more literally corresponds to 'color in the face' or 'emotion'. It was generally used alone and often implied sexual desire or desirability. During the Tang dynasty (618–907), the word yánsè came to mean 'all color'. A Chinese idiom meaning 'multi-colored', Wǔyánliùsè (五顏六色), can also refer to 'colors' in general.

Color or colour is the visual perception based on the electromagnetic spectrum. Though color is not an inherent property of matter, color perception is related to an object's light absorption, reflection, emission spectra and interference. For most humans, colors are perceived in the visible light spectrum with three types of cone cells (trichromacy). Other animals may have a different number of cone cell types or have eyes sensitive to different wavelength, such as bees that can distinguish ultraviolet, and thus have a different color sensitivity range. Animal perception of color originates from different light wavelength or spectral sensitivity in cone cell types, which is then processed by the brain.