I have always covered my outlet plates with the wallpaper.

I'd paper over the plates and switch the switches themselves to a different color (I don't think wallpaper would hold up on the switches). It might even be good to change them to *gasp* old fashioned toggle switches in almond color. The toggles don't yell at you as much as the big Lutron switches. The outlets could stay white if they are low.

They make clear glass plates that you could put wallpaper behind.

https://www.arnev.com/Beveled-Clear-Glass.html

Would you think of a metal finish that would match your light fixture(s)?

Wow, thanks for all the quick responses! I thought about covering them with wallpaper gracie01, but I'd still have that big wide white Lutron toggle switch. Fori's idea of wallpapering the plates but switching out the switch to a different color is a great solution. I would have to see if they make metal plates for Lutron Meg. That could work also. And palimpset I have never seen those glass covers! They are a definite possibility! I have a lot to think about now, thanks!

Light fixtures or door hardware finishes are also a possibility. I have satin brass door hardware and am using satin brass switch plates in some rooms.

I also found these paddle switches that are plastic but have an "antique brass" finish

https://www.kyleswitchplates.com/antique-brass-light-switches-sockets/

Lutron also makes colored switch plates: Lutron switch plates

arnev.com makes a variety of switchplates and they were great to work with (10-11 years ago) to customize wood switchplates for our kitchen.

Another option; Columbia Gorge Stoneworks made switchplates from the pieces of marble and travertine bathroom tile that we sent to them. Pricey, but a nice touch to our MB and hall bathroom (especially after saving $$$$ by doing a lot of the work ourselves!).

You can also order peel and stick outlet covers and matching peel and stick material for the paddle switches.

Thanks for that information about the peel and stick option mabel. I found them on the website cat_mom mentioned. I might use these for the outlets and wallpaper the outlet plates. Have you ever used them? Do they stick well?