Added more information to README

README.md

@@ -2,11 +2,17 @@
 
 **Color Helper** is a Visual Studio for macOS addin to add some color helper tools.
 
-* Convert color formats easily.
-* Color matching and palette design.
+* Convert color formats easily (hex, rgb).
+* Color matching and palette design. ColorBlender is based on: http://www.colorblender.com
 
 ![Color Helper](images/color-blender.gif)
 
+## Licenses
+
+This project uses some third-party assets with a license that requires attribution:
+
+- [ColorBlender](https://github.com/wieslawsoltes/ColorBlender): A .NET library for color matching and palette design by Wiesław Šoltés.
+
 ## Copyright and license
 
 Code released under the [MIT license](https://opensource.org/licenses/MIT).