The cover of the book has a white haired girl with a sword. It is set in Florida in the future sometime. She is a special breed of human that produces more blood than normal and is bred to be like a personal vampire bloodbag. The more gold tattoos you have, the better your blood tastes. Her vampire owner is found dead and she is accused of murdering him so she goes on the run to her aunt's place. She has to clear her name before she gets killed. On the way she meets a vampire who is cursed so that he cannot drink from the vein or he will drain a person dry.
That's Kristen Painter's House of Comarré series. There are 5 novels and a short story.
Copy from the first book, Blood Rights
Born into a life of secrets and service, Chrysabelle's body bears the telltale marks of a comarré—a special race of humans bred to feed vampire nobility. When her patron is murdered, she becomes the prime suspect, which sends her running into the mortal world...and into the arms of Malkolm, an outcast vampire cursed to kill every being from whom he drinks.
Now, Chrysabelle and Malkolm must work together to stop a plot to merge the mortal and supernatural worlds. If they fail, a chaos unlike anything anyone has ever seen will threaten to reign.
You can see her gold tattoos on all the book covers. She doesn't have a sword on the first book's cover, but does on a couple of them, such as the 2nd book:
Some other items that may be familiar: Malcolm lives with a werewolf who is cursed and a ghost on a boat in the harbor. Chrysabelle's aunt is a former Comarre who got out (and is wheel-chair bound from the fight, I believe). The vampires have clans each with a special power (such as Alchemy) depending on who turned you, but you can be "re-turned" to change clans.