diff --git a/resources/css/ext.uls.mixins.less b/resources/css/ext.uls.mixins.less
index e654d64e..1c006787 100644
--- a/resources/css/ext.uls.mixins.less
+++ b/resources/css/ext.uls.mixins.less
@@ -22,7 +22,7 @@
 
 		&::after {
 			/* @noflip */
-			border-left: 10px @border-style-base #fff;
+			border-left: 10px @border-style-base @border-color-inverted;
 			/* @noflip */
 			right: -10px;
 		}
@@ -38,7 +38,7 @@
 
 		&::after {
 			/* @noflip */
-			border-right: 10px @border-style-base #fff;
+			border-right: 10px @border-style-base @border-color-inverted;
 			/* @noflip */
 			left: -10px;
 		}