     </mat-slider>
          </div>
          <div>
            <label class="demo-color-label" for="g-slider">Green</label>
            <mat-slider aria-label="Green" id="g-slider" min="0" max="255" discrete>
              <input matSliderThumb [(ngModel)]="green" />
            </mat-slider>
          </div>
          <div>
            <label class="demo-color-label" for="b-slider">Blue</label>
            <mat-slider aria-label="Blue" id="b-slider" min="0" max="255" discrete>
              <input matSlid