Generated by SassMeister.com.

SassMeister-input-HTML.html

<div class="thing"></div>
<div class="thing thing--saturate"></div>
<div class="thing thing--scale-saturation"></div>

SassMeister-input.sass

// ----
// Sass (v3.3.0.rc.2)
// Compass (v1.0.0.alpha.17)
// ----

@import compass

$color: #843d85

.thing
  float: left
  width: 25%
  height: 0
  padding-top: 25%
  background-color: $color

.thing--saturate
  background-color: saturate($color, 50%)

.thing--scale-saturation
  background-color: scale-saturation($color, 50%)

SassMeister-output.css

.thing {
  float: left;
  width: 25%;
  height: 0;
  padding-top: 25%;
  background-color: #843d85;
}

.thing--saturate {
  background-color: #b30db6;
}

.thing--scale-saturation {
  background-color: #a21fa4;
}

SassMeister-rendered.html

<div class="thing"></div>
<div class="thing thing--saturate"></div>
<div class="thing thing--scale-saturation"></div>