Inspired by https://store.kde.org/p/1174691, This is exactly the same as the default Breeze Dark from plasma 5.9 and the only difference is that only the panels are opaque and there's no shadow. The difference with https://store.kde.org/p/1174691 is that in this case only the panel is opaque, everything else is transparent and has shadows exactly as the stock Breeze Dark. So even if the panel is transparent and has no shadow, the menu, the calendar and everything else will look as in stock Breeze Dark.

The best option would be to be able to change the panel transparency and to disable the shadow directly from a gui and without needing to create a different theme but i hope this helps those who want to blend the titlebar and the top panel.

Edit: i have no idea why the folder created when installing from "get new theme" dialog in preferences is called "metadata" when for any other theme installed is called by the name of the theme. If someone can point me into the correct direction to fix this i'd greatly appreciate it.