diff --git a/design/backend/css/tygh/ui_base/inputs.less b/design/backend/css/tygh/ui_base/inputs.less
index f9dc9a19d4..507dd50bb0 100644
--- a/design/backend/css/tygh/ui_base/inputs.less
+++ b/design/backend/css/tygh/ui_base/inputs.less
@@ -538,6 +538,23 @@ input[type="checkbox"] {
         }
     }

+    &:indeterminate {
+        background: @mainColor;
+        outline-color: @mainColor;
+        position: relative;
+
+        &:after {
+            content: "\f068";
+            font-family: FontAwesome;
+
+            position: absolute;
+            color: white;
+
+            top: 0px;
+            left: 0.5px;
+        }
+    }
+
     &:disabled {
         background: #888;
         outline-color: #888;
@@ -560,4 +577,11 @@ input[type="checkbox"].checkbox--large {
         top: 0px;
         left: 0px;
     }
+
+    &:indeterminate {
+        &:after {
+            padding-top: 6px;
+            padding-left: 6.5px;
+        }
+    }
 }