Emacs: how to get the default theme?

Question

I\'ve been using the default theme with about 10 faces changed via custom-set-faces for a while now. But from time to time I want to try out a couple of the custom

Answer 1

Adding another answer here since you don't necessarily know the current theme:

This removes all custom themes.

(dolist (theme custom-enabled-themes)
  (disable-theme theme))