Ashley I'm loving the theming option. It's great. A lot less strain on the eyes :)However, I would like to suggest a slight redesign on how we use the tool. It would be easier to have a 3 column table.
Object, visual colour button, RGB/HEX code
Event Sheet background, colour, code
Event background , colour, code
This way it would be easier to edit the theme. Also it would be nice if the colour code box could do a HEX symbol check. That way it would also be easier to use various online web colours without pre colour converting.