Editing the drop down menu / folders in the navigation menu

Site URL: https://www.edenroseextensions.co.uk

Hey!

Hoping someone can help - when I click on the drop down menu in the navigation bar, it comes up with a pink border for the pages. 

Does anybody know how to remove the pink border without removing the pink lines on the pages in my website? Or how to make changes to the style and colours of the drop down folders?

Thanks, Lucy

Add to Home > Design > Custom CSS

.subnav ul {
    border: none !important;
}

Amazing thank you!