Colour cast
![Example of a photo with a uniformly green colour cast due to differential absorption of light before reaching certain depths at sea.](/Images/godic/202501/05/Siganus_vulpinus_11129.jpg")
![The same photo with the colour cast corrected](/Images/godic/202501/05/Siganus_vulpinus_1_edit1129.jpg")
A colour cast is a tint of a particular colour, usually unwanted, which affects the whole, or portion, of a photographic image evenly.
Certain types of light can cause film and digital cameras to have a colour cast. Illuminating a subject with light sources of different colour temperatures will usually cause colour cast problems in the shadows. In general, the human eye does not notice the unnatural colour, because our eyes and brains adjust and compensate for different types of light in ways that cameras cannot.