The color is to a great extent determined by the color of the milk fat, and undergoes seasonal variations. Colors such as carotene and orleana, a natural anatto dye, are used to correct these seasonal variations in countries where coloring is permitted. Other using color dyes.
It is concentrated form of milk . The yellow colour can be decolorized when passed through some gases but it gives soothing effect and looks delicious therefore it is not decolorized and used in its original natural color.