Color temperature has nothing to do with panel types. The main difference is that the high contrast makes games look much more 3D and realistic on VA panels. A quote from RTINGS that I agree with 100%:
"Contrast is the most important factor in picture quality. While neither of these LCD technologies will achieve the black levels of OLED, some are better than others.
VA technology is far beyond IPS panels when it comes to contrast. Blacks are far darker, and it shows. When in a dark environment, blacks will appear gray on IPS TVs, substantially diminishing the experience. VA contrast ratios usually range from 3000:1 to 6000:1, IPS typically have contrast ratios closer to 1000:1. Because of this, VA LCDs will always top our Movie ratings, only surpassed by OLEDs. This only impairs the dark room performance, though, since the difference is far less visible in a bright environment."