I am Confused!!!

I just had a great idea for a marine army.....they use the Blood Angels Codex and they are called the Blood Priests, the idea is that they are sent out to retrieve lost gene-seed of commanders of fallen companies. Their armour would be bleached bone....with Red Shoulder Trim....and Kommando Khaki Eagle on the Chest any weapon casings are black, except a power fist which is Red also.