              <button title="Sort ratios ascending" id="sort" onclick="sortColorScales()"
                            class="spectrum-ActionButton spectrum-ActionButton--sizeM spectrum-ActionGroup-item">
                            <svg xmlns:xlink="http://www.w3.org/1999/xlink"
                                class="spectrum-Icon spectrum-Icon--sizeS sortIcon" focusable="false" aria-hidden="true"
                                aria-label="Sort">
                                <use xlink:href="#spectrum-c