Example of variable overrides with .scss, highlighting that variables are not emuatable

SassMeister-input-HTML.html

<div class="box"></div>

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.1)
// Compass (v0.13.alpha.10)
// ----

$box-background-color: red;
$box-background-color: blue !default;
$box-background-color: green;

.box {
  background: $box-background-color;
  width: 100px;
  height: 100px;
}

SassMeister-output.css

.box {
  background: green;
  width: 100px;
  height: 100px;
}

SassMeister-rendered.html

<div class="box"></div>