White Balance

White balance is the process of removing unrealistic colour casts, so that items which are appear white to the human eye, are rendered white in your recorded images. Proper 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.

The higher the colour temperature, the more "blue" the light source is

 

Here are some various camera button which allows colour temperatures to be adjusted