What is the difference between color temperature, chromaticity and hue when taking pictures?

Color temperature is white balance, that is, how to keep a photo from color cast.

Chromaticity refers to saturation, and its function is to control the depth of picture color.

Tone changes the color of the picture.

Color temperature (colo(u)r temperature) is a measure of light color of light source, and the unit is K (Kelvin). Color temperature has important applications in photography, video recording, publishing and other fields. The color temperature of the light source is determined by comparing the color of the light source with the theoretical hot blackbody radiator. The Kelvin temperature when the hot blackbody radiator matches the color of the light source is the color temperature of that light source, which is directly related to Planck's law of blackbody radiation.

Chroma, color uses brightness and chroma * * *, while chroma is an attribute of color except brightness, reflecting hue and saturation of color.

Hue is the primary feature of color and the most accurate standard to distinguish different colors. In fact, any color except black, white and gray has the property of hue, and hue is composed of primary color, intermediate color and composite color. Tone, texture and appearance that color can present. Different colors in nature are infinitely rich, such as purplish red, silver gray and orange yellow. Hue is the appearance title of various colors.