index: use rgba for thumbnail background-color

diff --git a/css/bootswatch.css b/css/bootswatch.css
index 3b86d69..c7432a2 100644 (file)
--- a/css/bootswatch.css
+++ b/css/bootswatch.css
@@ -82,7 +82,7 @@ body {
 
 .thumbnail {
        margin-bottom: 20px;
-       background-color: #eee;
+       background-color: rgba(0, 0, 0, 0.1);
 }
 
 .thumbnail img {