mdb-ui-kit/sass/_progress.scss

.progress {
    height: 4px;
    border-radius: 0;
    box-shadow: none;
    background: #c8c8c8;
    .progress-bar {
        box-shadow: none;
    }

    // Alert buttons
    // --------------------------------------------------

    .progress-bar-default {
      @include progress-bar-variant($primary);
    }
    .progress-bar-primary {
      @include progress-bar-variant($primary);
    }
    // Success appears as green
    .progress-bar-success {
      @include progress-bar-variant($success);
    }
    // Info appears as blue-green
    .progress-bar-info {
      @include progress-bar-variant($info);
    }
    // Warning appears as orange
    .progress-bar-warning {
      @include progress-bar-variant($warning);
    }
    // Danger and error appear as red
    .progress-bar-danger {
      @include progress-bar-variant($danger);
    }

    // Material shades
    .progress-bar-material-red {
        @include progress-bar-variant($red)
    }
    .progress-bar-material-pink {
        @include progress-bar-variant($pink);
    }
    .progress-bar-material-purple {
        @include progress-bar-variant($purple);
    }
    .progress-bar-material-deeppurple {
        @include progress-bar-variant($deeppurple);
    }
    .progress-bar-material-indigo {
        @include progress-bar-variant($indigo);
    }
    .progress-bar-material-lightblue {
        @include progress-bar-variant($lightblue);
    }
    .progress-bar-material-cyan {
        @include progress-bar-variant($cyan);
    }
    .progress-bar-material-teal {
        @include progress-bar-variant($teal);
    }
    .progress-bar-material-lightgreen {
        @include progress-bar-variant($lightgreen);
    }
    .progress-bar-material-lime {
        @include progress-bar-variant($lime);
    }
    .progress-bar-material-lightyellow {
        @include progress-bar-variant($lightyellow);
    }
    .progress-bar-material-orange {
        @include progress-bar-variant($orange);
    }
    .progress-bar-material-deeporange {
        @include progress-bar-variant($deeporange);
    }
    .progress-bar-material-grey {
        @include progress-bar-variant($grey);
    }
    .progress-bar-material-bluegrey {
        @include progress-bar-variant($bluegrey);
    }
    .progress-bar-material-brown {
        @include progress-bar-variant($brown);
    }
    .progress-bar-material-lightgrey {
        @include progress-bar-variant($lightgrey);
    }

}