Well first off there are 2 B5 blue paint colors , EB5 started in 69
GB5 started in 71 & is much darker so there is a cooor difference between years , what code is yours ?
the second problem is all of the mixes I have seen for the FC7 are out to lunch & not just a little , my friend mixed a custom Purple for his car after trying FC7 from 12 different manufacturers, every FC7 mix was a different color from the others & none were close , the paint my friend custom mixed was matched to the paint in hidden areas of my car & was virtually perfect match to my car just a slight bit dark !! He has a great memory I guess Anyway my car is being painted with his mix as it is so close to the original color , the other issue with purple is that the paint was bad , it barely stuck to the cars & faded badly so most purple cars are rusty & the paint match was from faded paint .