It's a mix of all the Bucks' different uniform colors, thus the green and red. You can see the purple and blue in there, too. The one exception is the biggest, most noticeable thing on the entire shoe which is shiny gold. I'm sure it's there to represent the championship he won, but it would look so much better with a simple white or cream and have the swoosh outlined in any of the other colors or even outlined in gold instead of a bold, solid color.
I think the model itself (regardless of future colors) would look better with the swoosh outlined instead of solid. It would flow well with the lines.