Updated Color Corrections (markdown)

Color-Corrections.md

@@ -1 +1,19 @@
-TODO
+Color-Corrections are meant to modify a color in a fixed, predefined way.   
+   
+A good example and the only predefined Color-Correction in CUE.NET is the [gamma correction](https://en.wikipedia.org/wiki/Gamma_correction) (often configurable in games).   
+Applying a color-correction to a brush is straight forward and might look like this:
+```C#
+IColorCorrection gammaCorrection = new GammaCorrection(2);
+myBrush.ColorCorrections.Add(gammaCorrection);
+```
+   
+### Implementing an own color-correction
+To implement your own color-correction you just need to implement the _IColorCorrection_-interface which contains only the _ApplyTo_-method.
+```C#
+    public interface IColorCorrection
+    {
+        void ApplyTo(CorsairColor color);
+    }
+```
+The _ApplyTo_-method contains all the logic to modify the color given as a parameter.   
+You can look at the [gamma-correction](https://github.com/DarthAffe/CUE.NET/blob/master/ColorCorrection/GammaCorrection.cs#L81) for a reference on how this might look.