custom-reset-faces
custom-reset-faces is a compiled Lisp function in `cus-face.el
'.
(custom-reset-faces &rest ARGS)
Reset the specs of some faces to their specs in specified themes.
This creates settings in the `user' theme.
Each of the arguments ARGS has this form:
(FACE FROM-THEME)
This means reset FACE to its value in FROM-THEME.