What exactly is a Color Cast?
A color cast is a tint of a particular color (usually unwanted ), that affects a photographic image in whole or in part.
The environment can create color casts on your subject(s) such as buildings, colors of the walls, green grass and trees, etc. Shooting Mid-Day when the sun is at it's brightest can have the greens from the grass or trees reflect back on your subject.
Clothes can attribute to color casts, both by the photographer and the subject.
Even High ISO's and underexposed images can cause color casts.
Find out more in the video below and how to correct in Adobe Photoshop.