toggleContrast">
              <input
                type="checkbox"
                onclick="toggleContrast()"
                id="toggleContrast"
              />
              <div class="button" title="Contrast">
                <i class="off material-icons">exposure</i>
                <i class="on material-icons">exposure</i>
              </div>
            </label>
            <!--Opacity toggle-->
            <label for="toggleOpacity">
              <input
                type="checkbox"
        