Is B3 blue the same as UU1 Blue?

Mine is in parts so I can't do a good comparison. I have a 68 notch back Barracuda in UU1 blue. A friend has a 67 in B3 blue. He hasn't had time to come by house and we live in different towns. I saw his after it was repainted and compared it to some parts I've taken from mine plus pictures of my firewall. Mine appears darker. Is that simply my impression and they are the same or is there a difference? Thanks.