green

I use white Wilson Pro Overgrip and instead of the overgrip changing to a dirty brown color it changes to a dark green color. Not sure that this is necessarily a tennis question but hoping someone would know why this happens.

Is there one guy that tested the new Black Code Fire or Lime ? I heard the Fire would be like the Volkl orange Cyclone (that I prefer to the black one) and the lime like a Revolve spin green. Some reviews would be welcome !

First it started with Nike, and now Adidas's French Open wear is going for green...