Updated ColorButton README

README.md

@@ -2,6 +2,8 @@
 
 The Forms GTK Toolkit is a collection of helper functions and custom controls for Xamarin.Forms GTK Backend.
 
+![](images/formsgtktoolkit.png)
+
 ## Features
 
 ### Controls

docs/Controls/ColorButton.md

@@ -0,0 +1,16 @@
+# ColorButton
+
+ The **ColorButton** is a button which displays the currently selected color and allows to open a color selection dialog to change the color. 
+
+![](../../images/colorbutton.png)
+
+## Properties
+
+
+- **Color**: The selected color.
+- **Title**: The title for the color selection dialog
+
+## How to use?
+
+    <controls:ColorPicker
+          Color="Red" />