diff --git a/bin/omarchy-theme-set-browser b/bin/omarchy-theme-set-browser
index ee189d17bb..19deb0bb42 100755
--- a/bin/omarchy-theme-set-browser
+++ b/bin/omarchy-theme-set-browser
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# omarchy:summary=Apply the current theme color to Chromium, Chrome, Edge, and Brave
+# omarchy:summary=Apply the current theme color to Chromium, Chrome, Edge, Brave, and Zen
 # omarchy:hidden=true
 
 CHROMIUM_THEME=~/.config/omarchy/current/theme/chromium.theme
@@ -42,3 +42,4 @@ refresh_running_browser msedge microsoft-edge-stable
 set_browser_policy /etc/brave/policies/managed
 refresh_running_browser brave brave
 refresh_running_browser brave-origin-beta brave-origin-beta -f
+omarchy-theme-set-zen
diff --git a/bin/omarchy-theme-set-zen b/bin/omarchy-theme-set-zen
new file mode 100755
index 0000000000..1c5ea1bddb
--- /dev/null
+++ b/bin/omarchy-theme-set-zen
@@ -0,0 +1,175 @@
+#!/bin/bash
+
+# omarchy:summary=Apply the current theme color to Zen browser
+# omarchy:hidden=true
+# omarchy:aliases=omarchy set-zen-theme
+
+THEME_COLORS=~/.config/omarchy/current/theme/colors.toml
+ZEN_CONFIG_DIR=~/.config/zen
+
+read_theme_color() {
+  sed -n "s/^$1 = \"\([^\"]*\)\"$/\1/p" "$THEME_COLORS"
+}
+
+set_zen_theme() {
+  [[ -d $ZEN_CONFIG_DIR && -f $THEME_COLORS ]] || return
+
+  local background foreground accent cursor surface profile_dir chrome_dir omarchy_css user_chrome_css user_js
+  background=$(read_theme_color background)
+  foreground=$(read_theme_color foreground)
+  accent=$(read_theme_color accent)
+  cursor=$(read_theme_color cursor)
+  surface=$(read_theme_color color0)
+
+  [[ -n $background && -n $foreground && -n $accent && -n $cursor && -n $surface ]] || return
+
+  for profile_dir in "$ZEN_CONFIG_DIR"/*; do
+    [[ -f "$profile_dir/prefs.js" ]] || continue
+
+    chrome_dir="$profile_dir/chrome"
+    omarchy_css="$chrome_dir/omarchy-theme.css"
+    user_chrome_css="$chrome_dir/userChrome.css"
+    user_js="$profile_dir/user.js"
+
+    mkdir -p "$chrome_dir"
+
+    cat >"$omarchy_css" <<EOF
+/* Generated by Omarchy */
+:root {
+  color-scheme: dark !important;
+  --zen-primary-color: $background !important;
+  --zen-colors-primary: $background !important;
+  --zen-colors-secondary: $surface !important;
+  --lwt-accent-color: $background !important;
+  --lwt-text-color: $foreground !important;
+  --lwt-frame: $background !important;
+  --lwt-frame-inactive: $background !important;
+  --toolbar-bgcolor: $background !important;
+  --toolbar-color: $foreground !important;
+  --toolbar-field-background-color: $surface !important;
+  --toolbar-field-color: $cursor !important;
+  --toolbar-field-border-color: $accent !important;
+  --toolbar-field-focus-background-color: $surface !important;
+  --toolbar-field-focus-color: $cursor !important;
+  --toolbar-field-focus-border-color: $accent !important;
+  --tab-selected-bgcolor: $surface !important;
+  --tab-selected-textcolor: $cursor !important;
+  --tab-hover-background-color: color-mix(in srgb, $accent 16%, transparent) !important;
+  --toolbarbutton-hover-background: color-mix(in srgb, $accent 16%, transparent) !important;
+  --toolbarbutton-active-background: color-mix(in srgb, $accent 28%, transparent) !important;
+  --arrowpanel-background: $surface !important;
+  --arrowpanel-color: $foreground !important;
+  --arrowpanel-border-color: $accent !important;
+  --sidebar-background-color: $background !important;
+  --sidebar-text-color: $foreground !important;
+  --sidebar-border-color: $accent !important;
+  --newtab-background-color: $background !important;
+  --newtab-text-primary-color: $foreground !important;
+}
+
+#main-window,
+#main-window::before,
+#main-window::after,
+#zen-sidebar-icons-wrapper,
+#zen-sidebar-icons,
+#zen-sidebar,
+#zen-sidebar-panel,
+#zen-vertical-tabs,
+#zen-workspaces-button,
+#browser,
+#appcontent,
+#tabbrowser-tabbox,
+#tabbrowser-tabpanels,
+#zen-appcontent-wrapper,
+#navigator-toolbox,
+#navigator-toolbox-background,
+#nav-bar,
+#TabsToolbar,
+#titlebar,
+#titlebar-spacer,
+#zen-sidebar-top-buttons,
+#zen-sidebar-foot-buttons,
+#sidebar-box,
+#zen-sidebar-web-panel-wrapper,
+browser[type="content-primary"] {
+  background-color: $background !important;
+  color: $foreground !important;
+}
+
+#urlbar-background,
+.searchbar-textbox {
+  background-color: $surface !important;
+  color: $cursor !important;
+  border-color: $accent !important;
+}
+
+#sidebar-box,
+#sidebar-main,
+#sidebar,
+#sidebar-splitter,
+#sidebar-splitter::before,
+#sidebar-splitter::after,
+#zen-sidebar-splitter,
+#zen-sidebar-splitter::before,
+#zen-sidebar-splitter::after,
+.sidebar-splitter::before,
+.sidebar-splitter::after,
+.sidebar-splitter,
+.zen-sidebar-splitter,
+.zen-sidebar-splitter::before,
+.zen-sidebar-splitter::after,
+splitter,
+splitter::before,
+splitter::after {
+  border-right: 0 !important;
+  border-left: 0 !important;
+  box-shadow: none !important;
+  background-color: $background !important;
+  background: $background !important;
+}
+
+#zen-sidebar-icons-wrapper,
+#zen-sidebar-icons,
+#zen-sidebar,
+#zen-sidebar-panel,
+#zen-vertical-tabs {
+  background: $background !important;
+  background-color: $background !important;
+}
+
+splitter#zen-sidebar-splitter,
+splitter#zen-sidebar-splitter:hover,
+splitter#zen-sidebar-splitter::before,
+splitter#zen-sidebar-splitter::after {
+  appearance: none !important;
+  border: 0 !important;
+  border-inline: 0 !important;
+  box-shadow: none !important;
+  outline: 0 !important;
+  opacity: 1 !important;
+  background: $background !important;
+  background-color: $background !important;
+}
+EOF
+
+    if [[ ! -f $user_chrome_css ]]; then
+      cat >"$user_chrome_css" <<'EOF'
+@import url("omarchy-theme.css");
+EOF
+    elif ! grep -Fq '@import url("omarchy-theme.css");' "$user_chrome_css"; then
+      printf '\n@import url("omarchy-theme.css");\n' >>"$user_chrome_css"
+    fi
+
+    if [[ ! -f $user_js ]] || ! grep -Fq 'toolkit.legacyUserProfileCustomizations.stylesheets' "$user_js"; then
+      cat >>"$user_js" <<'EOF'
+user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
+EOF
+    fi
+  done
+
+  if pgrep -x zen-browser >/dev/null; then
+    omarchy-restart-app zen-browser
+  fi
+}
+
+set_zen_theme