My phone shows some inverted colors whenever the screen brightness is low or in dark mode.

Hello Dasiedu2,

We have help for concern with seeing inverted colors on your iPhone display. We'll provide steps to walk through from this guide: Use display and text size preferences on your iPhone, iPad, and iPod touch

1. Go to Settings > Accessibility.
2. Tap Display & Text Size.
3. Disable Smart Invert.
4. Disable Classic Invert.
5. Go to Settings > Accessibility > Touch.
6. Choose Back Tap.
7. Make sure Classic or Smart Invert is not set for either option.

Then, restart your iPhone: Restart your iPhone

If the issue persists, reply back here.

Best regards.