Scss force get hex value for the provided colour

SassMeister-input.scss

// ----
// Sass (v3.4.21)
// Compass (v1.0.3)
// ----

@function returnHexValue($color){
    @debug $color;
    @if $color == "white" {
        @return "#fff";
    }
    @if $color == "black" {
        @return "#000";
    }
    @return $color;
}

@function force-hex($color) {
    @if type-of($color) == 'color' {
        $hex: str-slice(ie-hex-str($color), 4);
        @return unquote("\##{$hex}");
    }
    @return $color;
}

body{
  color: force-hex(teal);
}

SassMeister-output.css

body {
  color: #008080;
}