Completed additions

Added the namespaces and attribute that are required for this change. Need to get in the habit of doing proper PRs through VS's Git.....

src/Discord.Net/Entities/Roles/Color.cs

@@ -1,5 +1,9 @@
+using System;
+using System.Diagnostics;
+
 namespace Discord
 {
+    [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
     public struct Color
     {
         /// <summary> Gets the default user color value. </summary>