I adjusted my contrast on graphene OS by accident and tried setting it back (shows as default) but the colors are still messed up. 

Any way to reset without wiping? 

Feels like I’ve tried everything already except reinstalling the OS.. 

 There is a GrapheneOS channel on TG. You can ask there for help: https://t.me/GrapheneOS 

 There is also a GrapheneOS channel on SimpleX Chat so Telegram not needed.  

 Can you please send me the link to the chat? 

 I've thought about making a screenshot of the settings for this reason.  

 Damn that sucks.

Solution one: https://m.youtube.com/watch?v=qO7rI21qiDE

Solution two:
Try removing the battery, which resets some. 

 👀