css - How to set colour to f:selectItem in primefaces? -


how set colour selectonemenu in primefaces ?

 <p:selectonemenu id="col" value="#{projectscontroller.selected.listcolor}">                     <f:selectitem itemlabel="activity" itemvalue="1"  class="redbackgroundcolor"/>                     <f:selectitem itemlabel="activity1" itemvalue="2" class="bluebackgroundcolor"/>                     <f:selectitem itemlabel="activity2" itemvalue="3" class="greenbackgroundcolor"/>                  </p:selectonemenu>

and here css 

.redbackgroundcolor{     background-color:red;         }

(and ofcourse blue , green..) doesnt affect behavior of primeface.

it's impossible in jsp can in javascript

for example : 

      $(this).children("tbody").children("tr").each(function () {               if ($(this).children("td").children("input").val() == 1) {                        $(this).addclass("redbackgroundcolor");                 }

..... it's work me.


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