How do I reset PWA theme and background colors to the weweb default?

I watched @Joyce ’s excellent video on Weweb dark mode https://youtu.be/iaQtddtgx20?si=2BFUD-Z6HYawHwLh

It didn’t work for me because weweb is using the Theme and Background colors that I had previously set in the MORE>PWA dialog. I can’t see a way to reset those to the Weweb default. Any suggestions?

@joyce @flo IF there is in fact no way to reset the weweb defaults, is this something your team could do on your back end?