diff --git a/themes/tiddlywiki/vanilla/base.tid b/themes/tiddlywiki/vanilla/base.tid
index 56c49a8f0..0350fefd8 100644
--- a/themes/tiddlywiki/vanilla/base.tid
+++ b/themes/tiddlywiki/vanilla/base.tid
@@ -176,6 +176,10 @@ dl dt {
 	margin-top: 6px;
 }
 
+button, textarea, input, select {
+	outline-color: <<colour primary>>;
+}
+
 textarea,
 input[type=text],
 input[type=search],