[lewaff]

I will try Firebug
the files which have to be mod
skin1/skin_admin.css

/*
Order statuses
*/

.notFinished {
BACKGROUND-COLOR: #FFCCFF;
}
.queued {
BACKGROUND-COLOR: #CCFFFF;
}
.processed {
BACKGROUND-COLOR: #99FF99;
}
.backordered {
BACKGROUND-COLOR: #CCCCFF;
}
.declined {
BACKGROUND-COLOR: #FFCCCC;
}
.failed {
BACKGROUND-COLOR: #FF9999;
}
.complete {
BACKGROUND-COLOR: #CCFFCC;
}

skin1/main/order_status.tpl
skin1/main/orders_lists.tpl