Fix your photos white balance

If you have a discolored photo, one of the easiest ways to fix it is with Photoshop, Picasa, or Gimp’s “Auto Color” feature. LifeHacker also mentions that in the Auto Levels, Image -> Adjustments feature will go a long ways.
We can add on by saying that in GIMP, there is also this feature. Auto Color would fall under
Tools -> Color Tools -> Levels. On the right side is an “Auto” button. Click it and your white balance will adjust in the picture itself.
LifeHacker < PhotoQuickies