1971 Duster- B5 or B3 ??

B1 is baby blue or "Blue Sky" and not available intil 72. There were baby blue colors available in the early 60's though.
B3 is a light silvery blue
B5 is a vibrant medium blue and
B7 is a dark blue

My 70 Swinger was originally B3 but was painted B5 by the previous owner.001 50.jpg