adds code comments

src/Umbraco.Web.UI.Client/src/less/variables.less

@@ -41,8 +41,8 @@
 @purple-washed:		    #F6F3FD;
 
 // UI Colors
-@red-d1:                #F02E28;
-@red:                   #D42054;// updated 2019
+@red-d1:                #F02E28;// currently used for validation, and is hard coded inline in various html places :/
+@red:                   #D42054;// updated 2019 - should be used as validation! and is already in some cases like the .umb-validation-label
 @red-l1:			    #e22c60;// updated 2019
 @red-l2:			    #FE8B88;
 @red-l3:			    #FFB2B0;