Generated by SassMeister.com.

SassMeister-input-HTML.html

<ul>
  <li class="dark"></li>
  <li class="brand-dark"></li>
  <li class="brand-color"></li>
  <li class="brand-light"></li>
  <li class="light"></li>
  <li class="brand-secondary"></li>
</ul>

SassMeister-input.scss

// ----
// Sass (v3.4.13)
// Compass (v1.0.3)
// ----

// color pallete
$white: #fff;
$brand-color: #88d9e6;
$brand-secondary: #8b8Bae;
$dark: #374b4a;
$brand-dark: mix($brand-color, $dark, 80%);
$brand-light: mix($brand-color, $white, 40%);
$brand-secondary: mix(invert($brand-color), $dark, 90%);
li {
  display: inline-block;
  width: 100px;
  outline: 1px solid hotpink;
  height:100px;
  }
// variables
.dark {
  background-color: $dark;
}

.brand-color {
  background-color: $brand-color;
}

.brand-dark {
  background-color: $brand-dark;
}

.brand-light {
  background-color: $brand-light;
}

.brand-secondary {
  background-color: $brand-secondary;
}

SassMeister-output.css

li {
  display: inline-block;
  width: 100px;
  outline: 1px solid hotpink;
  height: 100px;
}

.dark {
  background-color: #374b4a;
}

.brand-color {
  background-color: #88d9e6;
}

.brand-dark {
  background-color: #77bcc6;
}

.brand-light {
  background-color: #cfeff5;
}

.brand-secondary {
  background-color: #70291d;
}

SassMeister-rendered.html

<ul>
  <li class="dark"></li>
  <li class="brand-dark"></li>
  <li class="brand-color"></li>
  <li class="brand-light"></li>
  <li class="light"></li>
  <li class="brand-secondary"></li>
</ul>