FMTSO: White on white

" White Balance (WB) in photography has to do with the accuracy of color in your image.

Different sources of light have different color temperatures. 

So white does not always look white in your photos.  

While your eye naturally adjusts to the light temperature, 

your camera tries to adjust, but may not always adjust correctly.  

While choosing the correct white balance will enhance 

the appearance and accuracy of your images, 

it is critically important when shooting people. 

Skin tones that look too blue or too orange are not only inaccurate, 

but also not very flattering. "

Outdoor on a cloudy day.

Indoor in a mall , with lots of lights tend to give the picture a yellowish tinge unless you set the camera under tungsten or fluorescent lighting.

 

In a restaurant with tungsten setting. 

 But if you forgot to set the camera, no worries, there's some photo-editing software that's able to do that.  :p