Learn how to re-enable dynamic transparency on Ubuntu 19.04 in both the top bar and in the Ubuntu Dock, making the dock background transparent..
GNOME developers have removed the translucent top bar effect from the GNOME Shell theme's code, citing unaddressed issues with panel text legibility.
This posts shows you how to replace the colorful Telegram tray icon on Linux with a GNOME Shell colored white set. It's a simple tweak that anyone can do.