Improve unsightly border around pinned tabs with dark themes

Pinned tabs with dark themes are currently ugly. The border should be removed or made a less jarring color. The new design is gorgeous; let’s get pinned tabs to match!
Pinned Tabs

Sure! I noticed the same thing. It was very ugly. How to reverse this?

Not a fan. They also feel bigger. The spacing and borders around normal tabs is fine. Let’s get rid of this monstrosity please!