Reply To: change color in menu underline

@oldpille : There is web developer tools inspection protection on your site. So, I cannot debug what’s causing that white background. Try to add the following CSS in the “Appearance => Customize => Additional CSS” box and if it still doesn’t work then can you deactivate that plugin so that we can inspect the CSS.

.dropdown-toggle {
   background-color: transparent !important;
}

Regards,
Sakin