I always thought that the "standard" was sort of like the cable pairs. We always use White jacket for voice (cat 3 or cat5e) use Blue jacket (cat 5e or 6) for data or just go with Blue Cat5e/6 and Yellow/orange Cat5e/6 for an IP network. If for any reason the customer is crazy and wants to go all out with the cabling (which is a nic problem to have) we go white cat3 then blue cat5e/6 1 and yellow cat5e/6 2. NOW if we are needing to pull cable from Graybar and they don't have something in yellow to match the "cookie cutter" I try to find something outlandish that is way out of the norm like pink or hot green for the second color,, it helps to distinquish (sp?) Only had to do that once or twice. Jack color is a whole new argument.

~Chris