diff --git a/docs/index.html b/docs/index.html
index 3a817c4..1408db0 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -14,6 +14,7 @@
margin:auto;
border: 5px solid var(--theme-webpage-canvas_border);
border-radius: 10px;
+ background-color: darkslategray;
}