diff --git a/HslColor-object-API.md b/HslColor-object-API.md
index 6c4de3c..a7721df 100644
--- a/HslColor-object-API.md
+++ b/HslColor-object-API.md
@@ -1,4 +1,6 @@
-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)
+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)  
+
+**NOTE:** HslColor has no concept of RGB or W channels.  It can be converted to RGB, but when converted to RGBW, RGBWW, and RGBWWW the W channels will always be empty.
 
 ![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)