diff --git a/src/pretix/base/models/event.py b/src/pretix/base/models/event.py
index bfbc528378..cd16a8d637 100644
--- a/src/pretix/base/models/event.py
+++ b/src/pretix/base/models/event.py
@@ -826,18 +826,24 @@ class Event(EventMixin, LoggedModel):
 
     def enable_plugin(self, module, allow_restricted=False):
         plugins_active = self.get_plugins()
+        from pretix.presale.style import regenerate_css
 
         if module not in plugins_active:
             plugins_active.append(module)
             self.set_active_plugins(plugins_active, allow_restricted=allow_restricted)
 
+        regenerate_css.apply_async(args=(self.pk,))
+
     def disable_plugin(self, module):
         plugins_active = self.get_plugins()
+        from pretix.presale.style import regenerate_css
 
         if module in plugins_active:
             plugins_active.remove(module)
             self.set_active_plugins(plugins_active)
 
+        regenerate_css.apply_async(args=(self.pk,))
+
     @staticmethod
     def clean_has_subevents(event, has_subevents):
         if event is not None and event.has_subevents is not None:
diff --git a/src/pretix/presale/style.py b/src/pretix/presale/style.py
index 76deabefc8..eb76e05b67 100644
--- a/src/pretix/presale/style.py
+++ b/src/pretix/presale/style.py
@@ -20,7 +20,7 @@ from pretix.multidomain.urlreverse import get_domain
 from pretix.presale.signals import sass_postamble, sass_preamble
 
 logger = logging.getLogger('pretix.presale.style')
-affected_keys = ['primary_font', 'primary_color']
+affected_keys = ['primary_font', 'primary_color', 'theme_color_success', 'theme_color_danger']
 
 
 def compile_scss(object, file="main.scss", fonts=True):