Generated by SassMeister.com.

SassMeister-input-HTML.html

<div class="feature-intro">
  <div class="container">
    <div class="abs-elem"></div>
  </div>
</div>

SassMeister-input.scss

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

$boolean : false !default;

@if $boolean {
  .selector {
    color: black;
  }
}

@if not $boolean {
  .selector {
    color: white;
  }
}

SassMeister-output.css

.selector {
  color: white;
}

SassMeister-rendered.html

<div class="feature-intro">
  <div class="container">
    <div class="abs-elem"></div>
  </div>
</div>