Outline button color style for use with the .btn base style.

<div class="mb1">
  <button class="btn btn-outline">Button</button>
  <a href="#!" class="btn btn-outline">Link Button</a>
  <input type="button" class="btn btn-outline" value="Input Button">
</div>

By default, .btn-outline inherits color from its parent. Use color utilities to adjust the color per button.

<div class="p1">
  <button class="btn btn-outline mb1 blue">Button</button>
  <button class="btn btn-outline mb1 black">Button</button>
  <button class="btn btn-outline mb1 navy">Button</button>
  <button class="btn btn-outline mb1 olive">Button</button>
  <button class="btn btn-outline mb1 red">Button</button>
  <button class="btn btn-outline mb1 fuchsia">Button</button>
  <button class="btn btn-outline mb1 purple">Button</button>
  <button class="btn btn-outline mb1 maroon">Button</button>
</div>

<div class="p1 bg-black">
  <button class="btn btn-outline mb1 aqua">Button</button>
  <button class="btn btn-outline mb1 teal">Button</button>
  <button class="btn btn-outline mb1 lime">Button</button>
  <button class="btn btn-outline mb1 green">Button</button>
  <button class="btn btn-outline mb1 yellow">Button</button>
  <button class="btn btn-outline mb1 orange">Button</button>
  <button class="btn btn-outline mb1 gray">Button</button>
  <button class="btn btn-outline mb1 silver">Button</button>
</div>