Looks like "stone braid" is the border name. Interestingly, Latham has one that is the opposite of this (grey and blue switched) and they are currently using it as the banner picture for the page. Here is a link to the 2016 liner samples that includes the stone braid that is the closest I can find to the one you are asking about: Latham Pool Liners

I'm sorry for the delay. This project was done in 2011 and I do not have the exact liner information. I do know it was a Latham liner.