[css-scrollbars] Add scrollbar-border-color, scrollbar-border-style, scrollbar-border-width properties #12730
Description
Very often it happens to me that I'm not able to tell whether I'm at the beginning or at the end of a document. The scrollbar colors displayed by web browsers often do not provide enough distinctive information to tell:
From the 80's 'til the 10's we had 3D scrollbars with outset borders giving the impression of a raised scrollbar … for a good reason: Accessibility.
So, I propose to add scrollbar-border-color, scrollbar-border-style and scrollbar-border-width properties to the CSS Scrollbars Styling Module for web authors to be able to support accessibility with their scrollbars:
