GENERATE SAFE TEXT COLORS WITH SASS

gistfile1.scss

$lightness-bound : 70 !global;
$hue-bound-bottom : 40 !global;
$hue-bound-top : 200 !global;

@function checkDangerZone($color) {
    @if ( (lightness($color) > $lightness-bound) or (hue($color) > $hue-bound-bottom and hue($color) < $hue-bound-top )) {
      @return darken(desaturate($color, 70), 60);
    }

    @else {
      @return lighten(desaturate($color, 50), 60);
    }
}

Credit goes to Benjamin Charity
http://blog.benjamincharity.com/generate-safe-text-colors-with-sass/