Contrast color function for Foundation 6

color-contrast-foundation6.scss

@function get-contrast-color($bgcolor) {
    $darker-ratio: color-contrast($bgcolor, #000);
    $lighter-ratio: color-contrast($bgcolor, #fff);

    @if($darker-ratio > $lighter-ratio){ 
        @return #000;
    }

    @if($lighter-ratio > $darker-ratio){ 
        @return #fff;
    }
}