Add has-bg helpers for block background colors (#1628)

* Add has-bg helpers for block background colors

* Updating CHANGELOG

CHANGELOG.md

@@ -14,6 +14,10 @@
 
 * #1428 Fix `media-content` overflow
 
+### Improvements
+
+* Add `.has-bg` helpers for block background colors, like `.has-text`.
+
 ## 0.6.2
 
 ### New features

sass/base/helpers.sass

@@ -100,6 +100,8 @@ $alignments: ('centered': 'center', 'justified': 'justify', 'left': 'left', 'rig
     &:hover,
     &:focus
       color: darken($color, 10%) !important
+  .has-bg-#{$name}
+    background-color: $color !important
 
 @each $name, $shade in $shades
   .has-text-#{$name}