Nucleus is an adaptable UI theme for Atom with your favorite syntax coloring at its core! This gives the UI a coherent feel, with whatever syntax theme you like to use.
Inside atom go to settings, select Install and search for Nucleus.
Or install directly from the console:
apm install nucleus-dark-ui
Every color used in the UI is taken directly from a (dark) syntax theme. In order for this to work, the syntax theme needs to have a syntax-variables.less. A light version of this theme is still being worked on.