diff --git a/resources/skins.minerva.base.styles/ui.less b/resources/skins.minerva.base.styles/ui.less
index b17320e..91a955b 100644
--- a/resources/skins.minerva.base.styles/ui.less
+++ b/resources/skins.minerva.base.styles/ui.less
@@ -26,7 +26,7 @@ body {
 }
 
 .header-container {
-	border-bottom: 1px solid @colorGray13;
+	border-bottom: 1px solid @colorGray12;
 
 	&.header-chrome {
 		background-color: @chromeColor;