I have the Fenix 5x sapphire. The colors are muted due to the sapphire which is a bummer because it looks like the other display really poos with color. I've been using
CELLONIC® Screen Protector for Garmin Forerunner 55 Fitness Tracker Smart Watch Face Protector - 2.5D 0,30mm Full Glue 9H Tempered Glass Display Cover Crystal Clear: Amazon.co.uk: Electronics & Photo
What watch face do you use? : r/Garmin
Best Garmin Watch faces from Connect IQ 2019 edition - For Fenix 6 Fenix 5, Forerunner, Vivoactive 3 - YouTube