This color scheme uses more warm and lower brightness colors, which should be easy on your eyes. (It may look a little bit yellow (or dirty), this is intended.)
Contains 3 themes (Default, Dimmed and Lighter) that based on the same color scheme. Choose the one that fits your screen setting and your preference.
Recommended fonts: Fira Mono, Input (the font of the screenshot above) or Hack.
I'll also recommend the f.lux app.
Looking for the Atom theme? It's here