made text color of floating-label-input labels lighter

scss/forms/_floating-labels.scss

@@ -15,6 +15,7 @@
     padding: $form-floating-padding-y $form-floating-padding-x;
     pointer-events: none;
     border: $input-border-width solid transparent; // Required for aligning label's text with the input as it affects inner box model
+    color: $input-border-color;
     transform-origin: 0 0;
     @include transition($form-floating-transition);
   }