Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.9)
// Compass (v1.0.1)
// ----

$purple: #7049A3;

// Turn rgba values to rgb values
@function rgba2rgb($color, $bg : 255) {
  $a: alpha($color);

  $r: ((1 - $a) * $bg) + ($a * red($color));
  $g: ((1 - $a) * $bg) + ($a * green($color));
  $b: ((1 - $a) * $bg) + ($a * blue($color));

  @return rgb($r, $g, $b);
}

body {
  color: rgba2rgb(rgba($purple, 0.5));
}

SassMeister-output.css

body {
  color: #b7a4d1;
}