##Gimp - Select by Color

In Gimp we have the *Select by Color* tool (<kbd>Shift</kbd>+<kbd>O</kbd>) to allow a selection based on image color.

![enter image description here][1]

###Select by Color - Threshold `0`  
 By selecting a color difference threshold of `0` we will select only parts of the image with **exactly** the same color value (below shown for white):

 ![enter image description here][2]
 <sup>Image Source: [Wikimedia][3]</sup>
###Select by Color - Threshold `50`
 To select similar colors we need to increase the threshold, in the example below light green with a threshold of `50` was selected. While keeping the left mouse button pressed on selecting we can adjust this threshold visually while dragging the mouse pointer.

![enter image description here][4]


  [1]: https://i.sstatic.net/kSJ3y.png
  [2]: https://i.sstatic.net/qnwdF.png
  [3]: http://commons.wikimedia.org/wiki/File:InflatableBalloons.jpg
  [4]: https://i.sstatic.net/JRkkM.png