The other day we had a bulb replaced in the office:
The above image was taken just after we had a new bulb replaced. Both pillars are painted the SAME COLOR yet the two different fluorescent bulbs totally tweaked the color of the paint…one looks almost white and the other (closer one) is more of a tan.
Remember this when you consider and examine your print projects. Usually you have no idea what light the project will use when being viewed. Daylight to incandescent lighting is a HUGE jump in reflective color. Not everyone will look at that brochure under ideal conditions (and some are color blind too…).