Hey Vic, B5 blue is first. It looks very close to my car and by the way, I am posting a pic so you can see what your car might look like when done if you are going this route. B3 blue is second. It is more of a silver/bllue color. Correct me if I am wrong and someone please chime in but I have seen some 70s Darts in a darker blue and it was B7. A little tip. If your interior is blue most likely it is in the same shade as B7 for reference. Get it prepped, painted, and post them pics Vic!!
Chas.