Yes and no, I do not have any data that said it used or not used. It's there to give more control, to the webeditor, regarding which colors to use for the charts..

May be I can replace it by allowing the user to create their own color profile. So by default I would use the "accent" color profile and then remove 140 line of code used to define the HTML colors name. Let me know if you think that is a good idea.