added organizer color field

src/pretix/control/forms/organizer.py

@@ -1,6 +1,7 @@
 from django import forms
 from django.conf import settings
 from django.core.exceptions import ValidationError
+from django.core.validators import RegexValidator
 from django.utils.translation import ugettext_lazy as _
 from i18nfield.forms import I18nFormField, I18nTextarea
 
@@ -120,6 +121,16 @@ class OrganizerSettingsForm(SettingsForm):
         help_text=_('Choose all languages that your organizer homepage should be available in.')
     )
 
+    organizer_primary_color = forms.CharField(
+        label=_("Primary color"),
+        required=False,
+        validators=[
+            RegexValidator(regex='^#[0-9a-fA-F]{6}$',
+                           message=_('Please enter the hexadecimal code of a color, e.g. #990000.'))
+        ],
+        widget=forms.TextInput(attrs={'class': 'colorpickerfield'})
+    )
+
     organizer_homepage_text = I18nFormField(
         label=_('Homepage text'),
         required=False,

src/pretix/control/templates/pretixcontrol/organizers/edit.html

@@ -20,6 +20,7 @@
             <legend>{% trans "Display settings" %}</legend>
             {% bootstrap_form_errors sform %}
             {% bootstrap_field sform.locales layout="horizontal" %}
+            {% bootstrap_field sform.organizer_primary_color layout="horizontal" %}
             {% bootstrap_field sform.organizer_logo_image layout="horizontal" %}
             {% bootstrap_field sform.organizer_homepage_text layout="horizontal" %}
             {% bootstrap_field sform.event_list_type layout="horizontal" %}

src/pretix/control/views/organizer.py

@@ -24,6 +24,7 @@ from pretix.control.forms.organizer import (
 from pretix.control.permissions import OrganizerPermissionRequiredMixin
 from pretix.control.signals import nav_organizer
 from pretix.helpers.urls import build_absolute_uri
+from pretix.presale.style import regenerate_organizer_css
 
 
 class OrganizerList(ListView):
@@ -135,6 +136,7 @@ class OrganizerUpdate(OrganizerPermissionRequiredMixin, UpdateView):
                 user=self.request.user,
                 data={k: form.cleaned_data.get(k) for k in form.changed_data}
             )
+        regenerate_organizer_css.apply_async(args=(self.request.organizer.pk,))
         messages.success(self.request, _('Your changes have been saved.'))
         return super().form_valid(form)