I am not able to change the css of f:selectItems inside rich:select. I can change CSS of rich:Select successfully unfortunately I do fail when I try to change f:selectItem. You can see the code.. Any help will be appreciated.
The f:selectItem(s) element is a data element, not a ui element. It doesn't support the style or styleClass attributes.
Aside from the lack of JSF-level support, while HTML docs do indicate that styles may be applied to the HTML <OPTION> elements that selectItems render to when used as data for selectOneMenu, I have never seen a browser that would honor them.
An IDE is no substitute for an Intelligent Developer.