Go into a resource pack to restore the color, by collecting color channels like RGB, find a way out by exploring.
This map has 2 routes, I'll leave a tip for you: Look for gray blocks.
This map has a built-in resource pack that changes all wool blocks to a total color.
(The map is about 10 to 30 minutes long, depending on if you get stuck or not.)
Screenshots:
This map is only in version 1.12.2, make sure you have that downloaded, it's recommended to not use Shaders and have a high brightness setting so you can see. #corrupt# 1.12.2 Download
#corrupt#