Background image for Panel Group Image for showing certificates

<?xml version='1.0' encoding='UTF-8'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1" xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
    <af:panelGroupLayout id="pgl1" inlineStyle='background-image:url("../../resources/images/offwhite.jpg");'
                         layout="scroll">
        <af:richTextEditor value="#{pageFlowScope.cert}" id="rte1" label="" readOnly="true" simple="true"
                           contentStyle="width:100%">
            <?audit suppress oracle.adf.faces.compnotlabelled?>
        </af:richTextEditor>
    </af:panelGroupLayout>
</jsp:root>

attached image is the offwhite.jpg file