Chances are good that you're dealing with spate batches of colorant that were ordered at different times by the company you bought the colorant from. That is one of the challenges with colorant....getting an exact copy when you re-order color. As far as I know there is no promise made that , say junebug, in a particular brand of colorant is going to be identical if the supplier runs out and has to re-order. Using those pints I'd try to get as close as possible and then lock in on that recipe. Pints will last a while unless you're making thousands of baits in one color.