I found a way to set my ZSH_THEME differently in PHPStorm than in the terminal (because I run the IDE in light mode, like a monster, but the terminal in dark mode as intended)

In .zshrc:
```
if [[ -z "$ZSH_THEME" ]]; then
ZSH_THEME="agnoster"
fi
```

Then in PHPStorm, I can specify a ZSH_THEME environment key to set the theme I want.