Actually Leviticus 19 lists a whole bunch of unrelated laws. And while we are not under the condemnation of the law they are still valid concepts to live by. God's word is eternal, the law was not done away with but fulfilled (as in the payment for breaking them) by Christ. Kinda like if someone else agrees to pay your speeding tickets, that doesn't mean that 35 mph limit is to be ignored. Frankly, one's faith should be shown in their living, not their tattoos.
Not saying don't do it, just tossing it out for consideration.