diff --git a/HsbColor-object-API.md b/HsbColor-object-API.md
index 7fefd22..a03da16 100644
--- a/HsbColor-object-API.md
+++ b/HsbColor-object-API.md
@@ -1,4 +1,6 @@
-HsbColor represents a color object that is represented by Hue, Saturation, Brightness component values.  The primary use of this class is for easy definitions of color. The [Wikipedia article](https://en.wikipedia.org/wiki/HSL_and_HSV) on this colorspace uses the term "Value" instead of "Brightness".
+HsbColor represents a color object that is represented by Hue, Saturation, Brightness component values.  The primary use of this class is for easy definitions of color. The [Wikipedia article](https://en.wikipedia.org/wiki/HSL_and_HSV) on this colorspace uses the term "Value" instead of "Brightness".  
+
+**NOTE:** HsbColor 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 HSV color space](https://upload.wikimedia.org/wikipedia/commons/thumb/3/33/HSV_color_solid_cylinder_saturation_gray.png/320px-HSV_color_solid_cylinder_saturation_gray.png)