mdb-ui-kit/sass/_mixins.scss

@mixin card-variant($background, $color, $border) {
    background-color: $background;
    .card-footer, .card-header { border-color: $border; }
    color: $color;
    a { color: $color }
}

@mixin button-variant($color) {
    background-color: $color;
};

@mixin alert-variant($color) {
    background-color: $color;
};

@mixin progress-bar-variant($color) {
    background-color: $color;
};

@mixin navbar-variant($color) {
    background-color: $color;
};

@mixin icon-variant($color) {
    color: $color;
}