at first I used my own theme which used my own CSS.
the CSS worked fine.. but I had some issues with the size of the application (RAP Widget are bigger then SWT's).
so i decided to use the org.eclipse.rap.design.example.business.theme.
The problem is that CoolBar that created this way:
IWorkbenchWindowConfigurer configurer = getWindowConfigurer();
Control coolBar = configurer.createCoolBarControl(parent);
is creating CoolItems with white background. and I cant find a way to modify the background.
CSS not affecting it... or any other "magics" I tried.
is it a bug? or I miss something ?
im new to CSS also, but as it worked in my private theme, i dont see why it shouldnt work here.
here is the simple CSS I use for testing this.