diff --git a/tweaks/opaque/tweak.py b/tweaks/opaque/tweak.py
new file mode 100755
index 0000000..d47af50
--- /dev/null
+++ b/tweaks/opaque/tweak.py
@@ -0,0 +1,9 @@
+def define_arguments(parser):
+    color_args = parser.add_argument_group('Color tweaks')
+    color_args.add_argument('-O', '--opaque', action='store_true', help='make the background in menus/popovers opaque')
+
+
+def apply_tweak(args, theme, colors):
+    if args.opaque:
+        colors["elements"]["BACKGROUND-COLOR"]["light"]["a"] = 1
+        colors["elements"]["BACKGROUND-COLOR"]["dark"]["a"] = 1