changed default themes

config.org

@@ -330,12 +330,12 @@ Restore it to reasonable value after init. Also stop garbage collection during m
 (defun my/toggle-theme ()
   (interactive)
   (when (or *sys/windows* *sys/linux*)
-    (if (eq (car custom-enabled-themes) 'tango-dark)
-        (progn (disable-theme 'tango-dark)
-               (load-theme 'tango))
+    (if (eq (car custom-enabled-themes) 'plastic)
+        (progn (disable-theme 'plastic)
+               (load-theme 'leuven))
       (progn
-        (disable-theme 'tango)
-        (load-theme 'tango-dark)))))
+        (disable-theme 'leuven)
+        (load-theme 'plastic)))))
 
 (bind-key "C-c t" 'my/toggle-theme)
 #+END_SRC