I see that you're having an issue with the colors on your iPad. I'd be happy to take a look at this with you, to help get this resolved quickly.
According to the screenshot you've provided in your post, it looks like you're already in your settings. Let's double check these settings. Go to Settings > General > Accessibility > Display Accommodations, make sure that everything is set to "off" on this screen, except for Auto-Brightness. If you make any adjustments on this screen, go ahead and power off the iPad and back on and see if the issue remains.
This article can help too:
Use Display Accommodations on your iPhone, iPad, and iPod touch
If you still have an issue after that, I suggest trying the steps in this support article:
Get help with the display on your iPhone, iPad, or iPod touch
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Have a great day!