What do the numbers of a paint formula mean?

I am looking at custom paint colors. I was wondering what the numbers meant on the labels.





BAC Colorant OZ 32 64 128


Y3-Deep Gold 2 34 -- 1


etc.What do the numbers of a paint formula mean?
It's obvious that Y3 stands for Yellow 3 and is the color Deep Gold. I'm guessing it means they added 2 oz of it plus 34/32 of an ounce plus 1/128 of an ounce.What do the numbers of a paint formula mean?
it tells you what colorant was used and how much that way you can make the paint color again the y usually means yanks so y3 is 3 yanks a yank is when you bring a full squirt of colorant into the paint
Those are probably in-house (factory reference) numbers so that if there should be a problem with a particular batch, they know what pigments went into that particular can of paint.