Joe,
Kirk - do you know if the color code info is transmitted on uploads to Online services (I use Zenfolio & Photoshelter).
The reason I ask is I would like to get them to sort a gallery by my PM color code so that higher code could be the earliest images in a gallery?
If you use XMP and upload images, then the 'Label' field will be present, but it isn't color information, it is just the name portion, like 'Winner'. Whether those services allow you to sort by that XMP field is unknown to me, but the information is definitely there.
HTH,
-Kirk
