app/components/bosses/javascripts/init_component.js

gistfile1.txt

{
initComponent: function(){
  //your init component
},
colorBlock: function(value){
    return Ext.String.format('<div style="display:inline-block">{1}</div><div style="background-color:#{0};width:50px;height:10px;display:inline-block;margin:0 5px 0 5px;border:solid;border-color:gray;border-width:1px;"></div>', value, value);
  }
}