kde5 window titlebar

not sure if this is leftover config from 13.2 but the new Leap title bar seams too thick?
on 13.2 I used wolfy’s kde5 repo and it had a nice thin light green window title bar, the new Leap is a dark green extremely thick one, is this the new default I’ve been searching the kde config and can’t seam to find the window options?

I think what you’re describing is technically called the “chrome”

I don’t know about KDE specifically, but in general for all Desktops I know of this is configured as part of the Desktop “theme.”
So, try another theme or you may look for a specific configuration file setting.