My problem with the word ''accurate'' is in the translation you are putting on it.

What if the recording artist themselves listens to a (using your term) 'coloured' system next to one with near perfect measurements and says ''that is what I wanted people to hear when I recorded my album''.

Which one is accurate - the one which doesnt measure perfectly but ACCURATELY reflects what the original artist intended you to hear?

What if the recording engineer mastered the album to sound as it should on a ''coloured'' hifi - and it sounds nearer to what he intended on the coloured system, and therefore MORE ACCURATE.

What if, in designing a speaker (for example) a designer strives for a flat response, and in doing so has to remove other important aspects such as soundstage or dynamics in order to create the measurement required? Is this more accurate, less accurate or more accurate in one regard and less in others?

You've taken the word ''accurate'' and twisted it to mean 'flat response' or 'a studio monitor' and nothing else may apply.