It is my understanding that any color is fine, as long as it is a standard running shoe. In other words, do not show up with those shoes that have fingers for each of the toes. Just bring standard running shoes. That being said, I would not opt for neon green. Go with an understated color. It is a great idea to make sure they are gently broken in, yet still somewhat new. I got this information from the candidate portal.
My I suggest that you go to a running store and get your sneakers there. You will be doing quite a lot of running at WP. In fact, you will likely wear out two or three pairs a year. So, find a good running shoe store and let them fit you properly. As @Love4monsters noted - it will make a big difference and is worth every penny.
The store we found for my son even offers a military discount.
Agreed, go to a true running shoe store, get properly fitted, whip out wallet and be prepared to spend $150 plus per pair.
Footwear is the most important equipment on the packing list, don't skimp on it!
This can't be stated enough...,..