.example.color {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 1px solid #999;

    &.black {
        background: $black;
    }

    &.white {
        background: $white;
    }

    &.red {
        background: $red;
    }

    &.green {
        background: $green;
    }

    &.grey {
        background: $grey;
    }

    &.blue {
        background: $blue;
    }
}