If you're in the mood to do a little more, try updating the rest of the 'system tray' icons to match your set-up. Reference the system tray from the Candy Icons. This would make this popular...

Great job. It's my primary.

In bespin it is possible to get much more transparency on KDE 4 (eg. in system settings, dolphin, system monitor, ark). All You need is bespin and this trick: System Settings > Application...

I really like this theme. For me - the best at the moment. I manually added some transparency to buttons (by modifying kvantum .svg file). Aqua buttons looks really cool with Plasma 5...

It looks really good in GNOME and its default dark theme. I prefer Kora icons than Deepin icons.