title: Dynamically create global variables within mixin?
body: <p>I would like to generate "color weights" based on base colours.</p>
  
  <pre><code>@include generateColors(#518ef3, 'color-brand-1');
  </code></pre>
  
  <p>And this would create the following variables:</p>
  
  <pre><code>$color-brand-1: #518ef3; //base
  $color-brand-1-300: lighten(#518ef3, 20%);
  $color-brand-1-400: lighten(#518ef3, 10%);
  $color-brand-1-500: #518ef3;
  $color-brand-1-600: darken(#518ef3, 10%);
  $color-brand-1-700: darken(#518ef3, 20%);
  </code></pre>
  
  <p>And I could then use that colour spectrum within the application via the variable names. </p>