Launch the Settings application, go to Accessibility > Zoom, and make sure that the Low Light option is chosen under Zoom ...

Red light filters, also known as night mode or blue light filters, alter the color temperature of screens ... Start by ...

Majin Bu goes on to name the gold option as "Desert Titanium" which appears as dark gold and replaces the iPhone 15 Pro's Blue Titanium. Apparently, the new color is relatively deep and discrete ...