With the new underline styling feature it’s not possible to reset the color to be “Auto” again. It only allows picking from the variables & styles, but no auto option available.

This seems to be a bug. I had to re-create a text style because this wasn’t possible.

In addition (this is only tangentially related): it should be possible to leave the color on Auto / any pre-defined variable or style AND make it possible to change the opacity of the underline. So I can pick auto and then turn down the opacity to let’s say 50%. This is also needed for general fills and such!