Too often in color, the lighting environment is taken for granted. We see a light source as "white" and are not concerned with its actual spectral output. If it appears white, it is white and therefore will render colors properly. Or so many people think. In actuality what we call "white light" can have heavy biases toward the red, yellow, green or blue portions of the spectrum. Unless viewed in conjunction with each other, we perceive all of them as "white light." But the human eye integrates the information too easily, and therein lies our problem. Because the eye adapts so well to the various white light sources, it does not take into account the color reflectivity differences of the various objects we see. When it comes to color matching, this can be a very big problem.
If there is very little blue light coming from the light source, then there is very little blue light for the sample to reflect. The only thing worse would be to match two colors in complete darkness. You may find that the chances of a good color match are about the same!