Medium-to-high contrast theme. The most prevalent colours are variants of green, orange, red, yellow, and magenta.
Overgrowth comes in standalone light and dark versions (see further info below).
The font is Iosevka term slab.
JavaScript demo is source code of prismjs
The UI is my experimental fork of the default One Dark.
Search for overgrowth-dark-syntax
in Settings > Install > Themes. Or install it directly using the command:
apm install overgrowth-dark-syntax
Project page: https://protesilaos.com/overgrowth
Overgrowth light version: https://atom.io/themes/overgrowth-syntax
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.