NEED ADVICE for First Time Ride to South Mountain Emmaus

I have never ridden South Mountain Emmaus. I did drive down Alpine to the kiosk and pick up a map.
I was wondering if the colors of the trails have significance relating to difficulty levels.
Also I would appreciate a good route to follow. I normally ride Salisbury and understand Emmaus may be a little tougher depending upon the route.

thanks..............also email address is defuzer1@ptd.net