One Dark Vivid Syntax
This Atom theme is identical to the original One Dark theme, except that the colors are more vivid.
The font used in the screenshot is Fira Mono.
Install
apm install one-dark-vivid-syntax
Or go to Settings > Install and search for one-dark-vivid-syntax
.
Then after installing, select "One Dark Vivid" from the Settings > Themes > Syntax Themes drop-down menu.