diff --git a/modules/core/client/less/mt.less b/modules/core/client/less/mt.less
index dc28dbcb..3fc23c27 100644
--- a/modules/core/client/less/mt.less
+++ b/modules/core/client/less/mt.less
@@ -724,10 +724,12 @@ body {
 
 .tooltip {
     .tooltip-inner {
+        background-color: @mt-body-background-color;
         background-color: rgba(0, 0, 0, 0.8);
     }
     &.top {
         .tooltip-arrow {
+            border-top-color: @mt-body-background-color;
             border-top-color: rgba(0, 0, 0, 0.8);
         }
     }