Some userids red, others black - What's the difference?

[Scooper]

My userid is red, but most are black. Is there any significance to the color? I don't see where it can be edited by the user.

TIA.

[Maelstrom]

black = offline
red = online

[timmhaan]

there is an option to turn off the red color if you don't want everyone to see that you're currently online.

[Scooper]

black = offline
red = online
there is an option to turn off the red color if you don't want everyone to see that you're currently online.

Thanks, guys.