White balance is the process of removing unrealistic color casts so that objects which appear white in person are rendered white in your photographs. Camera white balance has to take into account the colour temperature of a light source which refers to the relative warmth or coolness of white light. Our eyes are good at seeing what is white under different light sources but digital cameras have difficulty with white balance and can create unwanted color casts. By understanding white balance, you can avoid these colour casts and improve your images under a wider range of lighting conditions.