diff --git a/HslColor-object-API.md b/HslColor-object-API.md
index 36f7e7c..1ce47c9 100644
--- a/HslColor-object-API.md
+++ b/HslColor-object-API.md
@@ -1,4 +1,7 @@
-HslColor represents a color object that is represented by Hue, Saturation, Lightness component values.  The primary use of this class is for easy definitions of color.
+HslColor represents a color object that is represented by Hue, Saturation, Lightness component values.  The primary use of this class is for easy definitions of color. See [Wikipedia article on HSL color space](https://en.wikipedia.org/wiki/HSL_and_HSV)
+
+![Visual representation of HSL color space](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6b/HSL_color_solid_cylinder_saturation_gray.png/320px-HSL_color_solid_cylinder_saturation_gray.png)
+
 
 ## Properties
 There are three properties that represent the component values Hue, Saturation, and Lightness.  The values range from 0.0f to 1.0f.  
@@ -9,6 +12,7 @@ float H;
 float S;
 float L;
 ```
+
 ## Constructors
 
 ### HslColor(float h, float s, float l) :