Hello CamaroNos,
Those look to be 3952717 3/8" type 4 tang which were Zinc or natural. Later replaced by 343463 also in natural. I have seen this listed as Blue by AMK.
The blues ones are (3953272 I believe) replaced by 343464 5/16" (1/4 or 5/16 tube od x 17/32 x 1/2) in blue solid marking dye (see below for the current marking dye used). Back in the day it was transparent marking dye. Layout fluid, that I am used to, while transparent is not the right shade of blue.
The 3952718 5/16" pipe with 23/32 hole green were also transparent marking dye it. It was also replaced by 343464 in blue.
Probably more information than you asked for......
Greg