Not color coded, but have done microphone cables at my church this way - P-touch label on the connector on each end, listing the length. 10, 15, 20, 25 ft Also, Alpha designators A - A - A - A - A, B - B - B - B - B, etc. Makes it easier to grab the right cord when you're sorting out devices - 'Hey, this mic for Joe is connected to Cable C, what port is it plugged in to ?" and such.