Is B3 blue the same as UU1 Blue?

UU1 is close to B5,a lot more blue than my B3 was.
I stand corrected by myself! B-3 Blue was first available in 1969.So, there was no B-3 in 67. However, DD1 in 67-68,Pale blue poly looks like 69 B3 light blue poly. 1968 UU1 light blue poly is darker, and first shows up in 68'. I gnore the names normally, the letter code is the main thing to look at.Sorry about that!:oops: