4.2.1 #Style.border.oneSide One side border

Toggle example guides Toggle HTML markup

The border can applied only in one side of your element. The available directions are top, bottom, left, right,

Browser support: IE3+, Safari1+, Firefox1+, Chrome10+

.sb-border-bottom-black .sb-border-left-yellow-1 .sb-border-top-green-3 .sb-border-right-black
Markup 
<span class="sb-margin sb-padding-xs sb-border-bottom-blue-1">
 .sb-border-bottom-black
</span>
<span class="sb-margin sb-padding-xs sb-border-left-yellow-1">
  .sb-border-left-yellow-1
</span>
<span class="sb-margin sb-padding-xs sb-border-top-green-3">
  .sb-border-top-green-3
</span>
<span class="sb-margin sb-padding-xs sb-border-right-black">
  .sb-border-right-black
</span>
Source: trumps/_border.scss, line 27