add some more custom config and put every thing in comment in the custom.yaml template
/* OVERRIDE */
.c-comment {
border:1px solid #FCFC6B;
background-color: #FFFFBD;
}
.c-comment .yui3-widget-hd {
background-color: #FCFC6B;
}
.c-comment a.c-close, .c-comment a.c-show-scope {
background-position: 0 -162px ;
}