OK, i got a bit board recently of the blue IDE colouring so I decided to start work on an editor for the theme.txt file
this is a work in progress and is by no means complete.
have a look and see what you think
it currently does not write back to the file yet so you cannot save your created themes but i will continue to work on this
it was written in visual basic 6 and works on windows 7 as that's what I used