The so-called color is just a reaction when certain wavelengths of electromagnetic waves are captured by our eyes  Although all objects with temperatures above absolute zero emit electromagnetic waves, only a few electromagnetic waves of specific wavelengths can cause human light perception  Among the electromagnetic waves radiated by the sun, in addition to visible light, there are also some infrared and ultraviolet rays that we cannot see
If all visible light is filtered out, no matter how strong the remaining electromagnetic waves are, we can only see darkness
The reaction of the eye after capturing the electromagnetic wave is the sense of light