String theory is an Atom UI theme based on Nucleus-Dark. Similarly to Nucleus,
it bases most of the coloring on the syntax theme you use within Atom, and works
best with a dark syntax theme. My personal recommendations for syntax themes are
seti or Base16 Tomorrow Dark.
Nucleus, while a great theme, is quite opinionated. As such, I felt more at ease forking rather than submitting a pull request. String-theory includes changes to several sections of the Atom UI, including a slightly cleaner status bar, tighter font and tab sizing, as well as some better control over gutter display.
Installing String-theory is as simple as installing another atom package. You
can either find it via the settings page, or by using apm:
apm install string-theory
Feel free to submit pull requests to further string-theory development. Thanks in advance for your help.