The lower the color temperature of the SLR camera, the redder the light color and the bluer the color. What is the principle?

There is nothing wrong with the questioner’s question. It’s just that the answers given by some friends upstairs were wrong. They confuse color temperature and picture tones with warm and cool colors.

The color of light is often expressed by the concept of color temperature. The color of the light source is related to the light color of the black body at a certain temperature. The temperature of the black body is the color temperature of the light source. As the temperature of a black body changes, the colors it radiates vary. The black body shows a gradient process from red-orange-red-yellow-yellow-white-white-blue-white. Simply put, the higher the temperature of an object, the more bluish-white it appears, and the lower it is, the more orange-red it appears. Such as the color of the flame, it is a reason that the temperature of the blue flame is obviously higher than that of the red flame.

So in the original film era, there were light films (light film) and daylight films (daylight films), as well as a bunch of color temperature correction filters (Leden 80~Leden 85). Modern digital cameras or digital video cameras even need to set or correct the white balance.