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 |
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 |
|---|---|
 |
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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.