diff --git a/contrib/static/site.css b/contrib/static/site.css
index d534ef1..3556508 100644
--- a/contrib/static/site.css
+++ b/contrib/static/site.css
@@ -104,6 +104,10 @@ th {
     padding-right: 15px;
 }
 
+#captcha_img {
+    background: #d3d3d3;
+}
+
 html {
     color: #ededed;
     background: #262230 url("/static/bg.png");