I frequently use a black and white copier to reproduce color material that I create. I have noticed that some colors reproduce well and others do not. By reproduce well, I mean the black and white image looks acceptable...things aren't too black, or too faded, and there is good brightness or contrast.
Is there a source that I can use to help me choose colors for my original so that the black and white copies look acceptable? Maybe a website? For example, if I know blue will reproduce as black or will look "muddy", perhaps I can use another color in the original (and the original is still acceptable.)