Jim Muth wrote:

You're nit-picking my words. I'm not writing a scientific paper. I'm sure you know what I meant.

Well, after you write paragraphs on light and its wavelengths and atoms and so on and so forth, then someone pointed out that you were way off base, and you reply that "colour is subjective anyway" an that you're "always subjective" ... it sounds a bit like "Oh, no! My ignorance is showing! Quick, change the subject!" Of course, what you were writing was irrelevant to the subject of reflection, anyway. Generally speaking, it's much easier to use the word "colour" in a commonly-recognised capacity to refer to an "electromagnetic power response spectrum" than it is to repeatedly use the latter phrase, when there is no likelihood of confusion arising (as has turned out not to be the case here). Maybe I hang out with a better class of human, but most of the ones I do so with tend to be able to grok which meaning of "colour" is intended in a given instance of its use from context. Morgan L. Owens "Now away with you to a more appropriate mailing list."