My Apple Watch face is red

..alexandrafromflorence..

Guessing is such a pastime here, while I choose to search

vaguely in hopes of some type of match by symptoms..

https://duckduckgo.com/?t=ftsa&q=face+red+apple+watch+means+what%3F&ia=web

Several ideas appear across the first page(s) of these results.

For some, 'red-face' appears, you'd have to start from regular

one ~ Then turn a knob; to change that into the red-face.

Why does the watch's face turn red? - Apple Community

//discussions.apple.com/thread/254588582?answerId

Other ideas appear, with some exact Apple Support links.

Apple Watch Ultra User Guide - Apple Support

How to use the new Night Mode on your Apple Watch Ultra

Introducing Apple Watch Ultra - Apple

Without having an Apple Watch, my older vintage analog

watches will have to suffice. Sorry; can't research further.

Well, at least 'search' is some kinda start! 🐝|🌺

Since you probably(?) have the Ultra Watch..

..IF not? Someone else might have use for this:

Probably easier to navigate via desktop browser.

Apple Watch Ultra User Guide (Table of Contents) - Apple Support

//support.apple.com/guide/watch-ultra/toc