I didn't like Renoise's default theme, or any of the bundled themes. To me, they're all either too dark and unfriendly, or too garish and unprofessional.
So I've made my own! :) This is how I think Renoise should look by default!
(Note that I couldn't figure out what a small number of colours were for. I've made them bright pink so they can be easily spotted if they appear.)