Fix #1789

sass/base/helpers.sass

@@ -108,6 +108,8 @@ $alignments: ('centered': 'center', 'justified': 'justify', 'left': 'left', 'rig
 @each $name, $shade in $shades
   .has-text-#{$name}
     color: $shade !important
+  .has-background-#{$name}
+    background-color: $shade !important
 
 .has-text-weight-light
   font-weight: $weight-light !important