This lore can be found on Corellia.
It can be obtained by completing the World Story arc on Corellia.
The legendary Corellian bloodstripes are only awarded to heroes who have faced certain death not in the heat of the moment, but after careful deliberation and full foreknowledge of the sacrifice. Although this recognition can technically be bestowed for any reason, the usual one is courage under fire during a military conflict. Corellian bloodstripes are traditionally worn as conspicuous colored piping running the length of the recipient’s trousers. A popular urban myth states that awardees who catch someone wearing unearned bloodstripes may kill that person without legal reprisal, but there are no records of such an event occurring.