sineemore

diff --git a/config.def.h b/config.def.h
index 546edda..4f3e806 100644
--- a/config.def.h
+++ b/config.def.h
@@ -82,6 +82,9 @@ char *termname = "st-256color";
  */
 unsigned int tabspaces = 8;
 
+/* bg opacity */
+float alpha = 0.8;