I think that it is more often used when referring to the overall image. What comes to your mind when you hear that a monitor produces a "crisp image": sharpness and precision or vivid colors? (I would say both, but the sharpness may be more important.) Would vivid colours and blurred contours qualify for a crisp image? Can a black and white monitor produce a crisp image? (Perhaps yes, but not with greyish tones of black and white?)Crisp is often used to describe colors in print and on various types of monitors/TVs. This is actually a reference to firm, sharp lines between colors, without any blurring or bleeding of tones. Used in this way, it makes some sense, but it is marketing at work again.