title: How to use bootstrap color variable in SASS
body: <p>It's bootstrap 4-beta in <code>SASS</code>.</p>
  
  <p>The question is how I can use the bootstrap color variable in my SASS application? What I have done to do this is:</p>
  
  <pre><code>color: $theme-colors(primary);
  </code></pre>
  
  <p>but this doesn't work and throws an error.</p>
  
  <p>any help is appreciated.</p>
  
  <p>Thank you</p>