Low-to-medium contrast theme. The most prevalent colours are variants of brown, green, orange, cyan, and yellow.
Gaia comes in standalone light and dark versions (see further info below).
The font is Iosevka term.
The UI is Atom Material.
Search for gaia-dark-syntax
in Settings > Install > Themes. Or install it directly using the command:
apm install gaia-dark-syntax
Project page: https://protesilaos.com/gaia
Gaia light version: https://atom.io/themes/gaia-syntax