Only a quick update that adds the group URL fix (see last post) and adds a nifty little box on the admin page to help with the hex values, expect a follow up release which will add a popup from which you can choose colours from (this is currently being delayed by CSS issues)
When you type in your hex code into the text box in the admin page and click off the text box it will update the colour next to the text box. As I said just now, this is a temporary measure until I can sort out the CSS