Looks like it's coming from where the line hooks up to the caliper. I put it back on after I had the calipers painted and I made sure that it was tight, but it is still leaking.
What do I need to do?

Did you make sure that you put on the washers, they are crush washer I believe and you can only use them once.

and I don't think you're supposed to re use them either.

Make sure that the line is not kinked in any way, so when you turn your wheel it will stretch freely.