Color code world mines based on current status

As time goes on, I tend to have many mines with a "pause" icon on them either because I no longer rely on it (but it still has resources), or because I emptied it. I also find it hard to tell between the blue checkmark for explored and a blue icon for a world mine I've discovered but haven't repaired yet. It would be nice to see at a glance the status of mines.
Color code the world mines based on current status. For example:
- yellow (what they're currently colored) - has some resource left
- red - no resources left (infinite world mines can never be this color)
- purple - discovered but not repaired world mines