diff --git a/.htaccess b/.htaccess
index c32b182..11932ed 100644
--- a/.htaccess
+++ b/.htaccess
@@ -24,6 +24,10 @@ ErrorDocument 404 /index.php
 # Set the default handler.
 DirectoryIndex index.php index.html index.htm
 
+# Add correct encoding for SVGZ.
+AddType image/svg+xml svg svgz
+AddEncoding gzip svgz
+
 # Override PHP settings that cannot be changed at runtime. See
 # sites/default/default.settings.php and
 # Drupal\Core\DrupalKernel::bootEnvironment() for settings that can be
diff --git a/core/themes/seven/css/theme/install-page.css b/core/themes/seven/css/theme/install-page.css
index d114dac..d3d2ee2 100644
--- a/core/themes/seven/css/theme/install-page.css
+++ b/core/themes/seven/css/theme/install-page.css
@@ -5,16 +5,18 @@
  * Unfortunately we have to make our styling quite strong, to override the
  * .in-maintenance styling.
  */
-.install-background {
+.install-page {
   background-color: #1275b2;
   background-image:
-    url(../../images/noise-low.png),
+    url(../../images/druplicon-watermark.svgz),
     -webkit-radial-gradient(hsl(203, 80%, 45%), hsl(203, 80%, 32%));
   background-image:
-    url(../../images/noise-low.png),
+    url(../../images/druplicon-watermark.svgz),
     radial-gradient(hsl(203, 80%, 45%), hsl(203, 80%, 32%));
-  background-repeat: repeat;
-  background-position: left top, 50% 50%;
+  background-repeat: no-repeat;
+  background-position: 50% 50%, 50% 50%;
+  background-size: 2600px 2600px;
+  background-attachment: fixed;
   min-height: 100%;
 }
 
diff --git a/core/themes/seven/images/druplicon-watermark.svgz b/core/themes/seven/images/druplicon-watermark.svgz
new file mode 100644
index 0000000000000000000000000000000000000000..14c5d1c0db75eb27290712bdeef95619479a88e7
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