I find it interesting that there is scant reference in the OP and most responses to the simple fact that the sound of live music has a tremendous amount of color, naturally. So, when we talk about adding “color” should we not ask the question “compared, or relative to what”?
The terms “accurate” and “neutral” are often misused, imo. Those descriptions don’t (shouldn’t) represent any particular sonic qualities. Unfortunately, the terms are often used to mean a lean, sterile and what I like to call a “bleached out”, or “gray” tonal quality. A tonal quality devoid of color. That is not the natural sound of music.
@roxy54 has it right. Systems that are tonally accurate, or neutral,
**** (the best ones) expose the timbre and texture that actually exists in the recording. It’s not an added coloration.****
Now, if by “adding color” we are talking about adding some pervasive tonal quality to the tonal character of one’s system through equipment choices, I suppose that this is a personal choice that one can’t argue with, but keep in mind that this will cause all recordings to have a certain tonal sameness. Not my cup of tea.