The colors listed on the site are the colors as produced and labelled by the gel manufacturer. The gels intended use is for stage lighting, with high luminosity 'white' lights. The effect that they have on the empegs display will be different due to the fact that the empeg's VFD is green-blue and significantly dimmer to start with. (The pink gel really is pink, but doesn't have much effect on the empeg)

Go by what your eyes tell you, and not by the labels.