diff --git a/Rgb48Color-object-API.md b/Rgb48Color-object-API.md
index 25a3c46..4ad94e9 100644
--- a/Rgb48Color-object-API.md
+++ b/Rgb48Color-object-API.md
@@ -32,6 +32,14 @@ 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
 
+### _explicit_ Rgb48Color(RgbwColor color);
+Construct a Rgbw48Color using RgbwColor, converting the R,G,B values and ignoring the W value.  Due to the loss of information of the W value, this constructor is marked explicit so it will not automatically be used for conversion.  
+> * _color_ - a RgbwColor object.
+
+### _explicit_ Rgb48Color(Rgbw64Color color);
+Construct a Rgbw48Color using Rgbw64Color, copying the R,G,B values and ignoring the W value.  Due to the loss of information of the W value, this constructor is marked explicit so it will not automatically be used for conversion.  
+> * _color_ - a Rgbw64Color object.
+
 ### Rgb48Color(RgbColor color);
 Construct a Rgbw48Color using RgbColor, converting the R,G,B values.
 > * _color_ - a RgbColor object.