Interestingly, the color temperature balance of the X9, right out of the box, is better with Brilliant Color on, than off. All four modes - PC, Movie, sRGB and Game, have almost identical color temperatures, with white consistantly around 6120K, with Brilliant Color off, but those same four modes are all in the 6556K to 6593K range, with Brilliant Color on.
Here is the same data as found in the Brightness section, which shows the white (100 IRE) temperature for each mode, with Brilliant Color off, and with it on:
With Brilliant Color Off and On