@mapman we talk about color all the time in the recording business as well. Anything that changes the sound from what came before is considered "coloring the sound" . Some colors are desirable, some not. It is also true @mahgister that studio monitors are used to reveal information, reveal color, reveal mistakes, etc so the mixer or mastering person can work from a place of truth instead of illusion. This is the basic reason low distortion loudspeakers are important in studio work. The dont make things sound better than they are.
Brad