Download PES 2015 Team Color Editor by Zioborgo/Razib_46&Tibinator
Latest update Pro Evolution Soccer PES 2015 Team Color Editor by Zioborgo/Razib_46&Tibinator for PC.
Colours 1 and 3 are for the nets (e.g. Levante having yellow and blue nets is because their entry in TeamColor.bin has blue as colour 1 and yellow as colour 3).
Colours 1 and 2 are for supporter banners (e.g. Levante having red and blue banners as their colour 1 is blue and their colour 2 is red).
I still have to figure out what is colour 4 for, as I made it yellow then purple for Levante (it was white originally) without noticing any difference ingame.