For use on blog post: http://normansolutions.co.uk/post/dip-your-toe-into-a-little-sass

SASSExample1.scss

    //Colour Lightening 10%
    $blueLighten10:lighten( $blue, 10% );
    $redLighten10:lighten( $red, 10% );
    $greenLighten10:lighten( $green, 10% );

    //Colour Darkening 10%
    $blueDarkening10:darken( $blue, 10% );
    $redDarkening10:darken( $red, 10% );
    $greenDarkening10:darken( $green, 10% );