Color of the progress bar on the slideshow LightGallery

Hi.

I am using the LightGallery option in the FinalTilesGallery. The default layout of the LightGallery when it’s open and has several images, starting the slideshow will work however, the progress bar at the top while the picture is displaying is always red. I have tried several way to workaround this, custom css all failed, i went to the core and edited the .css for the LightGallery where effectively the color red was set as the one for the progress bar, and still, the red is there. I was sucessful in editing the same color that was being applied to the hover and active thumbnails inside the slideshow, and that worked fine, but the progressbar I am stuck. Would appreciate some help, I use this plugin for several years and it is the first time I ask for some help.

Thanks,

David