Noedit: I really butchered the formatting and grammar of that.
Ok that's weird there's a color.txt librbary in which functions are defined for rgbToHex, hexToRgb, compToHex and hexToComp but hsvToRgb isn't defined anywhere. It is indeed called when looking at someone though. It's also only called then and nowhere else. Since I am not in the ability to test this (especially since I need a second person), try deleting line 618 entirely and changing line 619 in server.cs to:
commandToClient(%this.client, 'centerPrint', "<br><br><br><br><color:FFFFFF>You do not recognize this person.", 0.2);
It'll make it flat white but it whould work.
Note to do this in the serverside add-on, not the clientside one.