Here's the style as some of you asked me to share it.
Try to use monochrome 'actions' icons like what you see in the preview shot (if you go to your icons folder you see an 'actions' folder under different sizes, those are what I mean by 'actions' icons). I recommend Faenza+Faience's 'actions' icons. Actually you can replace any icon set's 'actions' with theirs
Important: You should use 'plasma-widget-menubar' with this style or it wouldn't look nice!
In order to use the Emerald theme you need to first install Smaragd. Install it either from your distro's repositories or the following link (don't forget to read the discription completely):[link]
The zip file contains the qtcurve config file, the color-scheme and the emerald theme. Enjoy.