diff --git a/CHANGELOG-EE b/CHANGELOG-EE
index 9cc7585804..201c71376e 100644
--- a/CHANGELOG-EE
+++ b/CHANGELOG-EE
@@ -2,6 +2,7 @@ v 7.9.0 (unreleased)
   - Strip prefixes and suffixes from synced SSH keys:
     `SSHKey:ssh-rsa keykeykey` and `ssh-rsa keykeykey (SSH key)` will now work
   - Check if LDAP admin group exists before querying for user membership
+  - Use one custom header logo for all GitLab themes in appearance settings
 
 v 7.8.0
   - Improved Jira issue closing integration
diff --git a/app/assets/stylesheets/sections/appearances.scss b/app/assets/stylesheets/sections/appearances.scss
index dd4a1b99ab..93c02f10f3 100644
--- a/app/assets/stylesheets/sections/appearances.scss
+++ b/app/assets/stylesheets/sections/appearances.scss
@@ -3,10 +3,9 @@
   margin-bottom: 20px;
 }
 
-.appearance-dark-logo-preview {
-  background-color: #F1F1F1;
-}
-
 .appearance-light-logo-preview {
-  background-color:  #373737;
+  background-color:  $style_color;
+  max-width: 72px;
+  padding: 10px;
+  margin-bottom: 10px;
 }
diff --git a/app/controllers/admin/appearances_controller.rb b/app/controllers/admin/appearances_controller.rb
index 51884ea6ec..6927740a43 100644
--- a/app/controllers/admin/appearances_controller.rb
+++ b/app/controllers/admin/appearances_controller.rb
@@ -37,11 +37,9 @@ class Admin::AppearancesController < Admin::ApplicationController
   def header_logos
     appearance = Appearance.last
     appearance.remove_light_logo!
-    appearance.remove_dark_logo!
-
     appearance.save
 
-    redirect_to admin_appearances_path, notice: 'Header logos were succesfully removed.'
+    redirect_to admin_appearances_path, notice: 'Header logo were succesfully removed.'
   end
 
   private
diff --git a/app/controllers/uploads_controller.rb b/app/controllers/uploads_controller.rb
index 810ac9f34b..5fb763aab9 100644
--- a/app/controllers/uploads_controller.rb
+++ b/app/controllers/uploads_controller.rb
@@ -29,7 +29,7 @@ class UploadsController < ApplicationController
   private
 
   def authorize_access
-    unless params[:mounted_as] == 'avatar'
+    unless %w(avatar logo light_logo).include?(params[:mounted_as])
       authenticate_user! && reject_blocked!
     end
   end
@@ -39,14 +39,15 @@ class UploadsController < ApplicationController
       user: User,
       project: Project,
       note: Note,
-      group: Group
+      group: Group,
+      appearance: Appearance
     }
 
     upload_models[params[:model].to_sym]
   end
 
   def upload_mount
-    upload_mounts = %w(avatar attachment file)
+    upload_mounts = %w(avatar attachment file logo light_logo)
 
     if upload_mounts.include?(params[:mounted_as])
       params[:mounted_as]
diff --git a/app/helpers/appearances_helper.rb b/app/helpers/appearances_helper.rb
index aa82b7ae65..71eec15c2b 100644
--- a/app/helpers/appearances_helper.rb
+++ b/app/helpers/appearances_helper.rb
@@ -15,21 +15,6 @@ module AppearancesHelper
     end
   end
 
-  def brand_header_logo
-    if brand_item.header_logos?
-      haml_tag(:style) do
-        # Dark theme/light logo
-        haml_concat ".dark_theme .app_logo a h1 {" \
-                    "background: url('#{brand_item.light_logo}') " \
-                    "no-repeat center center !important; }"
-        # Light theme/dark logo
-        haml_concat ".light_theme .app_logo a h1 {" \
-                    "background: url('#{brand_item.dark_logo}') " \
-                    "no-repeat center center !important; }"
-      end
-    end
-  end
-
   def brand_text
     markdown(brand_item.description)
   end
@@ -39,6 +24,10 @@ module AppearancesHelper
   end
 
   def brand_header_logo
-    image_tag 'logo-white.png'
+    if brand_item && brand_item.light_logo?
+      image_tag brand_item.light_logo
+    else
+      image_tag 'logo-white.png'
+    end
   end
 end
diff --git a/app/models/appearance.rb b/app/models/appearance.rb
index 2ac78199f8..1f8c4a2204 100644
--- a/app/models/appearance.rb
+++ b/app/models/appearance.rb
@@ -2,19 +2,8 @@ class Appearance < ActiveRecord::Base
   validates :title, presence: true
   validates :description, presence: true
   validates :logo, file_size: { maximum: 1000.kilobytes.to_i }
-  validates :dark_logo,
-    file_size: { maximum: 1000.kilobytes.to_i },
-    presence: true, if: :light_logo?
-
-  validates :light_logo,
-    file_size: { maximum: 1000.kilobytes.to_i },
-    presence: true, if: :dark_logo?
+  validates :light_logo, file_size: { maximum: 1000.kilobytes.to_i }
 
   mount_uploader :logo, AttachmentUploader
-  mount_uploader :dark_logo, AttachmentUploader
   mount_uploader :light_logo, AttachmentUploader
-
-  def header_logos?
-    dark_logo? && light_logo?
-  end
 end
diff --git a/app/views/admin/appearances/_form.html.haml b/app/views/admin/appearances/_form.html.haml
index 5370ba009e..cefd98784c 100644
--- a/app/views/admin/appearances/_form.html.haml
+++ b/app/views/admin/appearances/_form.html.haml
@@ -33,23 +33,16 @@
     %legend
       Navigation bar:
   .form-group
-    = f.label :dark_logo, class: 'control-label'
-    .col-sm-10
-      - if @appearance.dark_logo?
-        = image_tag @appearance.dark_logo, class: 'appearance-dark-logo-preview'
-      = f.file_field :dark_logo, class: ""
-      .hint
-        Maximum size is 1MB, page optimized for logo size 40x40px
-    = f.label :light_logo, class: 'control-label'
+    = f.label :light_logo, 'Header logo', class: 'control-label'
     .col-sm-10
       - if @appearance.light_logo?
         = image_tag @appearance.light_logo, class: 'appearance-light-logo-preview'
       = f.file_field :light_logo, class: ""
       .hint
-        Maximum size is 1MB, page optimized for logo size 41x41px
-      -if @appearance.light_logo? || @appearance.dark_logo?
+        Maximum size is 1MB, page optimized for logo size 72x72px
+      -if @appearance.light_logo?
         %br
-          = link_to 'Remove header logos', header_logos_admin_appearances_path, data: { confirm: "Header logos will be removed. Are you sure?"}, method: :delete, class: "btn btn-remove btn-small remove-logo"
+          = link_to 'Remove header logo', header_logos_admin_appearances_path, data: { confirm: "Header logos will be removed. Are you sure?"}, method: :delete, class: "btn btn-remove btn-small remove-logo"
 
 
   .form-actions
diff --git a/app/views/devise/shared/_signin_box.html.haml b/app/views/devise/shared/_signin_box.html.haml
index 6c1610e25d..1fb65c3937 100644
--- a/app/views/devise/shared/_signin_box.html.haml
+++ b/app/views/devise/shared/_signin_box.html.haml
@@ -30,19 +30,3 @@
 
     - elsif signin_enabled?
       = render 'devise/sessions/new_base'
-    - else
-      %div
-        No authentication methods configured.
-
-- if Gitlab.config.omniauth.enabled && devise_mapping.omniauthable?
-  .clearfix.prepend-top-20
-    %p
-      %span.light
-        Sign in with &nbsp;
-      - providers = additional_providers
-      - providers.each do |provider|
-        %span.light
-          - if default_providers.include?(provider)
-            = link_to authbutton(provider, 32), omniauth_authorize_path(resource_name, provider)
-          - else
-            = link_to provider.to_s.titleize, omniauth_authorize_path(resource_name, provider), class: "btn"
diff --git a/app/views/layouts/_head_panel.html.haml b/app/views/layouts/_head_panel.html.haml
index 7e4ea03cbf..fc8a487ece 100644
--- a/app/views/layouts/_head_panel.html.haml
+++ b/app/views/layouts/_head_panel.html.haml
@@ -2,7 +2,6 @@
   .navbar-inner
     .container
       %div.app_logo
-        - brand_header_logo if brand_item
         = link_to root_path, class: "home has_bottom_tooltip", title: "Dashboard" do
           = brand_header_logo
       %h1.title= title
diff --git a/features/steps/admin/appearance.rb b/features/steps/admin/appearance.rb
index 78b20e587a..4127d7af56 100644
--- a/features/steps/admin/appearance.rb
+++ b/features/steps/admin/appearance.rb
@@ -39,7 +39,6 @@ class Spinach::Features::AdminAppearance < Spinach::FeatureSteps
 
   step 'I attach header logos' do
     attach_file(:appearance_light_logo, File.join(Rails.root, 'public', 'header_logo_light.png'))
-    attach_file(:appearance_dark_logo, File.join(Rails.root, 'public', 'header_logo_dark.png'))
     click_button 'Save'
   end
 
@@ -49,7 +48,6 @@ class Spinach::Features::AdminAppearance < Spinach::FeatureSteps
 
   step 'I should see header logos' do
     page.should have_xpath('//img[@src="/uploads/appearance/light_logo/1/header_logo_light.png"]')
-    page.should have_xpath('//img[@src="/uploads/appearance/dark_logo/1/header_logo_dark.png"]')
   end
 
   step 'I remove the logo' do
@@ -57,7 +55,7 @@ class Spinach::Features::AdminAppearance < Spinach::FeatureSteps
   end
 
   step 'I remove the header logos' do
-    click_link 'Remove header logos'
+    click_link 'Remove header logo'
   end
 
   step 'I should see logo removed' do
@@ -66,7 +64,6 @@ class Spinach::Features::AdminAppearance < Spinach::FeatureSteps
 
   step 'I should see header logos removed' do
     page.should_not have_xpath('//img[@src="/uploads/appearance/light_logo/1/header_logo_light.png"]')
-    page.should_not have_xpath('//img[@src="/uploads/appearance/dark_logo/1/header_logo_dark.png"]')
   end
 
   def appearance