The key is to balance the phone screen itself before changing camera exposure.

Start by setting exposure for the grey background on the screen, not for the white text. Then adjust the phone to fit that exposure:

• Lower or manually set the phone’s screen brightness.
• Check Accessibility/Display settings for font size and contrast options.
• If available, use normal contrast instead of high contrast.

These changes reduce how harsh the white text appears and can help the grey UI elements stay visible.

Once the phone display is adjusted, use your camera exposure to hold the darker grey areas without pushing the whites too far. If you brighten only with camera settings, the text will usually clip or glare before the grey elements look right.

So the practical workflow is:

1. Set the phone to manual brightness.
2. Reduce contrast/adjust font settings if possible.
3. Expose the camera for the grey background.
4. Fine-tune until the white text is bright but not overpowering.

In short: optimize the screen first, then expose for the grey background.