If you need convincing of a light colour scheme, I'd like to direct you to a post on the topic.
Colours are based on Google's logo:
| Colours | |||
|---|---|---|---|
4285F4 |
EA4334 |
FCBC05 |
34A853 |
 |
 |
|---|---|
 |
 |
In PhpStorm, go to Settings > Editor > Color Scheme press the little cog next to the scheme selector, and choose Import Scheme.
This theme is still a work in progress. Feel free to send PRs and open issues.