Yep, that is the ANSI code for Bold and a Green foreground if I recall my ANSI ESC codes correctly, the highlighted character (before the '[' indicated is the ASCII ESC {character 27 or \033} code which is being rejected). Whether ANSI colour codes should be there is another matter which someone else has experienced. There Vadi pointed out that there would be something like ansiToRgb() but I don't know much more than that. I'm not in the right OS right now so will have to wait before I can investigate more...