How can I change color settings in StandBy mode on iPhone?

lils_crib wrote:

But currently the setting don’t allow anything but the red when you have standby mode set to “never” turn off. I don’t want to tap the phone in the middle of the night when I wake up and i want to know what time it is. Like a normal alarm clock where the display is always on.

Extracted from the Apple Article Keep the iPhone display on longer: "The display automatically turns off when iPhone is either face down or obstructed from view, not near a paired Apple Watch, when a CarPlay session begins, while Continuity Camera is in use, while Low Power Mode is on, while Sleep Focus is on, or at your usual bedtime."