update background utils

docs/4.0/utilities/colors.md

@@ -15,14 +15,14 @@ Contextual text classes also work well on anchors with the provided hover and fo
 
 {% example html %}
 {% for color in site.data.theme-colors %}
-<p><a href="#" class="text-{{ color.name }}{% if color.name == "white" %} bg-gray{% endif %}">{{ color.name | capitalize }} link</a></p>{% endfor %}
+<p><a href="#" class="text-{{ color.name }}{% if color.name == "light" %} bg-gray{% endif %}">{{ color.name | capitalize }} link</a></p>{% endfor %}
 {% endexample %}
 
 Similar to the contextual text color classes, easily set the background of an element to any contextual class. Anchor components will darken on hover, just like the text classes. Background utilities **do not set `color`**, so in some cases you'll want to use `.text-*` utilities.
 
 {% example html %}
 {% for color in site.data.theme-colors %}
-<div class="p-3 bg-{{ color.name }} {% if color.name == "white" %}text-gray-dark{% else %}text-white{% endif %}">.bg-{{ color.name }}</div>{% endfor %}
+<div class="p-3 mb-2 bg-{{ color.name }} {% if color.name == "light" %}text-gray-dark{% else %}text-white{% endif %}">.bg-{{ color.name }}</div>{% endfor %}
 {% endexample %}
 
 {% callout info %}

scss/utilities/_background.scss

-//
-// Contextual backgrounds
-//
-
-.bg-faded {
-  background-color: darken($body-bg, 3%);
-}
-
 @each $color, $value in $theme-colors {
   @include bg-variant('.bg-#{$color}', $value);
 }