Emacs disable-theme after loading a different one (themes conflict)

Question

On Emacs 24.3.1 if I M-X load-theme and load another theme, it often interferes with my current theme instead of replacing it, giving a very ugly result colour-wise.

An example is here, where the solarized-light and wombat themes are conflicting:

I solve this by doing a M-X disable-theme of the old theme, is there a cleaner way to solve this?

Answer 1

Disabling first the active theme certainly helps.

If you add this to your init.el:

(defun disable-all-themes ()
  "disable all active themes."
  (dolist (i custom-enabled-themes)
    (disable-theme i)))

(defadvice load-theme (before disable-themes-first activate)
  (disable-all-themes))

the function load-theme will first disable the active themes, before loading the new one.