Hi! I'm developing a new website, and I woul like to change the marker theat indicates a level in the submenus.

It's a graphic element, but I didn't found any way to change its color to fit with the site design. I guess it is an internal element of X5, but I need to change it.  The image attached shows the situation: the marker is white, while I'm using yellow elements

Any tip will be welcome, thanks in advance!