diff --git a/core/palettes/Vanilla.tid b/core/palettes/Vanilla.tid
index d2b765b02..067f32519 100644
--- a/core/palettes/Vanilla.tid
+++ b/core/palettes/Vanilla.tid
@@ -99,7 +99,7 @@ table-footer-background: #a8a8a8
 table-header-background: #f0f0f0
 tag-background: #ec6
 tag-foreground: #ffffff
-testcase-accent-level-1: #84C5E6
+testcase-accent-level-1: #c1eaff
 testcase-accent-level-2: #E3B740
 testcase-accent-level-3: #5FD564
 tiddler-background: <<colour background>>