diff --git a/themes/tiddlywiki/snowwhite/base.tid b/themes/tiddlywiki/snowwhite/base.tid
index 55efb72f2..b5f33f1c5 100644
--- a/themes/tiddlywiki/snowwhite/base.tid
+++ b/themes/tiddlywiki/snowwhite/base.tid
@@ -289,6 +289,7 @@ a.tw-tiddlylink-missing {
 
 .tw-page-controls svg:hover {
 	fill: #000;
+	<<filter "drop-shadow(1px 1px 2px rgba(255,255,255,0.9))">>
 }
 
 .tw-menu-list-item {
diff --git a/themes/tiddlywiki/starlight/styles.tid b/themes/tiddlywiki/starlight/styles.tid
index f91b9136f..4d99175be 100644
--- a/themes/tiddlywiki/starlight/styles.tid
+++ b/themes/tiddlywiki/starlight/styles.tid
@@ -16,6 +16,13 @@ tags: [[$:/tags/stylesheet]]
           box-shadow: $shadow$;
 ```
 \end
+\define filter(filter)
+```
+  -webkit-filter: $filter$;
+     -moz-filter: $filter$;
+          filter: $filter$;
+```
+\end
 \define background-linear-gradient(gradient)
 ```
 background-image: linear-gradient($gradient$);
@@ -45,6 +52,10 @@ html body {
   background: url(<<datauri "$:/themes/tiddlywiki/starlight/ltbg.jpg">>);
 }
 
+.tw-page-controls svg {
+  <<filter "drop-shadow(1px 1px 2px rgba(255,255,255,0.9))">>
+}
+
 /*
 ** Some rainbow icon colours
 */