Add visual feedback that properties have changed from default

webapp/src/assets/less/variables.less

@@ -15,6 +15,8 @@
 @darkened-primary-color: darken(@global-primary-background, 15%);
 @inverse-global-color: fade(@global-inverse-color, 80%);
 
+@very-light-primary-color: lighten(@global-primary-background, 40%);
+
 @global-border: #d5d5d5;
 
 // UIkit
@@ -265,6 +267,22 @@
     }
 }
 
+/*
+ * Text
+ */
+
+// A text label for an input control that is highlighted
+.ofm-highlighted-label {
+    color: @darkened-primary-color;
+    font-weight: 500;
+
+}
+
+.hook-inverse() {
+    .ofm-highlighted-label{
+        color: @very-light-primary-color;
+    }
+}
 
 /*
  * Links