           </dt>
            <dd>Modifies the intensity of the grayscale effect applied to all background color palettes until it has a given state.</dd>
            <dt>
              class <a href="classbn_1_1bg__palettes__grayscale__loop__action.html" class="m-doc">bn::bg_palettes_grayscale_loop_action</a>
            </dt>
            <dd>Modifies the intensity of the grayscale effect applied to all background color palettes from a minimum to a maximum. When the intensity is equal to the given final sta