Old post I know but since I struggled with this myself I thought Id share a workaround on the colors.
There's a file in the Extensions\Objects\D3CalendarView\lib\css-folder, called colorbrewer.css that holds the colors value. The problem was to find wich ones he uses. After a while I figured it out to be those starting with ".RdYlGn".
Then I had to find out how many classes he used, it was 9 levels so all thats left in the file is now