I think that in theory, red would be the best option exactly because it's already the color used by anyone in the official LT team. Also, it's far less ugly than the previous one you were using
In practice, however, there is a problem with it. By using the red color, Talvieno, you might defeat the fact that people usually saw the red anywhere here as an immediate shortcut for "Josh is here!". Sure, other people have or have had the red color. But, you are far more active in the forums than Francois Jolin is, than Andy Thompson was and, hack, than Josh himself is or will likely be. So you using the red creates a practical issue (no more "red = Josh is here", because now red will be everywhere) that others using the red color did not create.