diff --git a/bin/omarchy-theme-set b/bin/omarchy-theme-set
index 8dafed8bfa..9da151180d 100755
--- a/bin/omarchy-theme-set
+++ b/bin/omarchy-theme-set
@@ -65,6 +65,7 @@ omarchy-restart-helix
 omarchy-theme-set-foot
 omarchy-theme-set-gnome
 omarchy-theme-set-browser
+omarchy-theme-set-zen
 omarchy-theme-set-vscode
 omarchy-theme-set-obsidian
 omarchy-theme-set-keyboard
diff --git a/bin/omarchy-theme-set-zen b/bin/omarchy-theme-set-zen
new file mode 100755
index 0000000000..03545cefce
--- /dev/null
+++ b/bin/omarchy-theme-set-zen
@@ -0,0 +1,218 @@
+#!/bin/bash
+
+# omarchy:summary=Sync Omarchy theme colors to Zen Browser chrome
+# omarchy:hidden=true
+
+COLORS_TOML="$HOME/.config/omarchy/current/theme/colors.toml"
+THEME_NAME_FILE="$HOME/.config/omarchy/current/theme.name"
+ZEN_PROFILES_DIR="$HOME/.zen"
+USER_CHROME_IMPORT='@import url("omarchy.css");'
+USER_CHROME_PREF='user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);'
+
+[[ -d $ZEN_PROFILES_DIR ]] || exit 0
+[[ -f $COLORS_TOML ]] || exit 0
+
+parse_color() {
+  grep "^$1 " "$COLORS_TOML" | sed 's/.*= *"\(.*\)"/\1/'
+}
+
+ensure_user_chrome_import() {
+  local user_chrome_css="$1"
+  local temp_file
+
+  touch "$user_chrome_css"
+
+  if ! grep -Fxq "$USER_CHROME_IMPORT" "$user_chrome_css"; then
+    temp_file=$(mktemp)
+    printf '%s\n' "$USER_CHROME_IMPORT" >"$temp_file"
+    cat "$user_chrome_css" >>"$temp_file"
+    mv "$temp_file" "$user_chrome_css"
+  fi
+}
+
+ensure_user_chrome_pref() {
+  local user_js="$1"
+
+  if [[ -f $user_js ]] && grep -q '^user_pref("toolkit\.legacyUserProfileCustomizations\.stylesheets",' "$user_js"; then
+    sed -i --follow-symlinks -E 's/^user_pref\("toolkit\.legacyUserProfileCustomizations\.stylesheets", .*/user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);/' "$user_js"
+  else
+    printf '\n%s\n' "$USER_CHROME_PREF" >>"$user_js"
+  fi
+}
+
+sync_profile_theme() {
+  local profile_dir="$1"
+  local chrome_dir="$profile_dir/chrome"
+  local user_chrome_css="$chrome_dir/userChrome.css"
+  local omarchy_css="$chrome_dir/omarchy.css"
+  local user_js="$profile_dir/user.js"
+
+  mkdir -p "$chrome_dir"
+  ensure_user_chrome_import "$user_chrome_css"
+  ensure_user_chrome_pref "$user_js"
+
+  cat >"$omarchy_css" <<EOF
+/* Auto-generated by Omarchy. Do not edit manually. */
+/* Theme: $theme_name */
+
+:root {
+  --omarchy-bg: $bg;
+  --omarchy-fg: $fg;
+  --omarchy-accent: $accent;
+  --omarchy-surface: $surface;
+  --omarchy-surface-bright: $surface_bright;
+
+  --zen-accent-color: var(--omarchy-accent) !important;
+  --zen-border-color: var(--omarchy-surface) !important;
+  --zen-themed-toolbar-color: var(--omarchy-bg) !important;
+  --zen-colors-primary: var(--omarchy-accent) !important;
+  --zen-colors-secondary: var(--omarchy-surface) !important;
+  --zen-colors-tertiary: var(--omarchy-bg) !important;
+  --zen-dialog-background: var(--omarchy-bg) !important;
+  --zen-primary-color: var(--omarchy-accent) !important;
+}
+
+#TabsToolbar,
+#vertical-tabs,
+#tabbrowser-tabs,
+#zen-sidebar-container,
+#zen-appcontent-navbar-container,
+#zen-main-app-wrapper,
+#zen-sidebar-top-buttons,
+#zen-sidebar-foot-buttons,
+.zen-sidebar-panel-wrapper {
+  background-color: var(--omarchy-bg) !important;
+  color: var(--omarchy-fg) !important;
+}
+
+#vertical-tabs .toolbarbutton-1,
+#zen-sidebar-top-buttons .toolbarbutton-1,
+#zen-sidebar-foot-buttons .toolbarbutton-1,
+#tabbrowser-tabs .tabbrowser-tab {
+  color: var(--omarchy-fg) !important;
+}
+
+.tabbrowser-tab .tab-background {
+  background-color: transparent !important;
+}
+
+.tabbrowser-tab[selected] .tab-background,
+.tabbrowser-tab[visuallyselected] .tab-background,
+#tabbrowser-tabs .tabbrowser-tab[selected] {
+  background-color: var(--omarchy-surface) !important;
+  border-radius: 8px !important;
+}
+
+.tabbrowser-tab .tab-label {
+  color: var(--omarchy-fg) !important;
+  opacity: 0.6;
+}
+
+.tabbrowser-tab[selected] .tab-label,
+.tabbrowser-tab[visuallyselected] .tab-label {
+  color: var(--omarchy-fg) !important;
+  opacity: 1;
+}
+
+#nav-bar,
+#PersonalToolbar {
+  background-color: var(--omarchy-bg) !important;
+  border: none !important;
+}
+
+#urlbar-background {
+  background-color: var(--omarchy-surface) !important;
+  border: 1px solid var(--omarchy-surface-bright) !important;
+  border-radius: 8px !important;
+}
+
+#urlbar:focus-within #urlbar-background {
+  border-color: var(--omarchy-accent) !important;
+}
+
+#urlbar .urlbar-input {
+  color: var(--omarchy-fg) !important;
+}
+
+.urlbarView-row[selected] .urlbarView-row-inner,
+.urlbarView-row[selected] {
+  background-color: var(--omarchy-accent) !important;
+  color: var(--omarchy-bg) !important;
+}
+
+.urlbarView-row[selected] .urlbarView-title,
+.urlbarView-row[selected] .urlbarView-url,
+.urlbarView-row[selected] .urlbarView-secondary-action {
+  color: var(--omarchy-bg) !important;
+}
+
+browser,
+#tabbrowser-tabpanels,
+.browserStack {
+  background-color: var(--omarchy-bg) !important;
+}
+
+#zen-sidebar-splitter,
+#appcontent-splitter,
+.zen-sidebar-splitter {
+  background-color: var(--omarchy-surface) !important;
+  border: none !important;
+  min-width: 1px !important;
+  width: 1px !important;
+}
+
+#main-window {
+  border: 1px solid var(--omarchy-surface) !important;
+  outline: none !important;
+}
+
+#zen-appcontent-navbar-wrapper,
+#titlebar {
+  background-color: var(--omarchy-bg) !important;
+  border: none !important;
+  outline: none !important;
+  box-shadow: none !important;
+}
+EOF
+}
+
+restart_zen() {
+  local command=""
+
+  if omarchy-cmd-present zen-bin; then
+    command="zen-bin"
+  elif [[ -x /opt/zen-browser-bin/zen-bin ]]; then
+    command="/opt/zen-browser-bin/zen-bin"
+  elif [[ -x /opt/zen-browser/zen ]]; then
+    command="/opt/zen-browser/zen"
+  fi
+
+  [[ -n $command ]] || return 0
+
+  if pgrep -x zen >/dev/null || pgrep -x zen-bin >/dev/null; then
+    pkill -x zen 2>/dev/null || true
+    pkill -x zen-bin 2>/dev/null || true
+    sleep 1
+    "$command" &>/dev/null &
+  fi
+}
+
+theme_name=$(cat "$THEME_NAME_FILE" 2>/dev/null || echo "unknown")
+bg=$(parse_color "background")
+fg=$(parse_color "foreground")
+accent=$(parse_color "accent")
+surface=$(parse_color "color0")
+surface_bright=$(parse_color "color8")
+
+[[ -z $accent ]] && accent=$(parse_color "color4")
+[[ -z $accent ]] && accent="#89b4fa"
+[[ -z $surface ]] && surface=$bg
+[[ -z $surface_bright ]] && surface_bright=$surface
+
+for profile_dir in "$ZEN_PROFILES_DIR"/*; do
+  [[ -d $profile_dir ]] || continue
+  [[ -f $profile_dir/prefs.js || -f $profile_dir/user.js ]] || continue
+  sync_profile_theme "$profile_dir"
+done
+
+restart_zen