mixin colors

style.scss

    $brand-colors:
        grey   #57585b,
        orange #d1662a,
        purple #632f54,
        green  #5e6e63,
        yellow #d2a732,
        blue   #006e94,
        red    #790025;


    @each $color in $brand-colors {
         .brand-color {
            .#{nth($color, 1)} & {
                color: nth($color, 2);
            }
        }
    }