diff --git a/Rgb48Color-object-API.md b/Rgb48Color-object-API.md
index 589b405..95d8360 100644
--- a/Rgb48Color-object-API.md
+++ b/Rgb48Color-object-API.md
@@ -32,6 +32,10 @@ Constructs a Rgb48Color using Red, Green, and Blue color component values.
 Constructs a Rgb48Color using a single brightness value(0 - 65535). This works well for creating gray tone colors.   
 > * _brightness_ - brightness value where (0) = black, (32767) = gray, (65535) = white
 
+### Rgb48Color(RgbColor color);
+Construct a Rgbw48Color using RgbColor, converting the R,G,B values.
+> * _color_ - a RgbColor object.
+
 ### Rgb48Color(HtmlColor color);
 Construct a Rgb48Color using HtmlColor, converting the Html single value to Rgb component values
 > * _color_ - an HtmlColor object