I can't toggle dark mode off on my iPhone 12

I have an iPhone 12. Somehow dark mode got switched on and when i try to toggle it off, it doesn’t do anything. Restarted the phone 3 times, also did the option to manually set up dark mode for next day, still did nothing. Other weird thing, its not normal dark mode. Every picture or image is a negative. I even went on Amazon store and every pic was a negative.

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