Hi, thanks for the good review! I am working on another new theme at the moment, so it may be some time before I can make this one. A minimal color changing theme sounds very cool and I will definitely add it to my list.

Update: I have just finished the theme (I had to make it an add-on to work). Here is a link: https://addons.mozilla.org/en-CA/firefox/addon/animated-colors-extra-dark/. I hope you enjoy it, and feel free to let me know of any issues. :D