diff --git a/app/javascript/images/background-kosmos.jpg b/app/javascript/images/background-kosmos.jpg
new file mode 100644
index 000000000..6be143274
Binary files /dev/null and b/app/javascript/images/background-kosmos.jpg differ
diff --git a/app/javascript/styles/custom.scss b/app/javascript/styles/custom.scss
new file mode 100644
index 000000000..7a60d43cc
--- /dev/null
+++ b/app/javascript/styles/custom.scss
@@ -0,0 +1,26 @@
+@import 'application';
+
+body {
+  background-color: $ui-base-color;
+  background-image: url('../images/background-kosmos.jpg');
+  background-size: cover;
+  background-attachment: fixed;
+}
+
+body.about-body {
+  background-color: transparent;
+  background-image: url('../images/background-kosmos.jpg');
+  background-size: cover;
+  background-attachment: fixed;
+}
+
+.landing-page .learn-more-cta {
+  background: rgba(31, 35, 43, 50%);
+}
+
+.ui {
+  background-color: darken($ui-base-color, 7%);
+  background-image: url('../images/background-kosmos.jpg');
+  background-size: cover;
+  background-attachment: fixed;
+}
diff --git a/config/themes.yml b/config/themes.yml
index 9c21c9459..d032b009d 100644
--- a/config/themes.yml
+++ b/config/themes.yml
@@ -1,3 +1,3 @@
-default: styles/application.scss
+default: styles/custom.scss
 contrast: styles/contrast.scss
 mastodon-light: styles/mastodon-light.scss