a polarizer polarizes light, it does not actually change a color. as light goes around, it travels in waves, some up and down, some side to side, a polarizer makes it so only one or the other gets seen. reflections are scattering of light so eliminating all but one wave direction eliminates a reflection. exact same thing with the sky. Because it eliminated certian "directions of light wave" if you take two polarizers and hold them at 90 degrees to each other, they will eliminate all light.
so to answer your question, no, by its nature a polarizer does not actually change colors, it just eliminates all but a single direction of light wave lenght.
and good....well, i like my Cokin Polarizer... thought Hoya is good and i think Nikon makes a sweet polarizer