The D800 is really good on colors out of the camera.
I am limited on what corrections I can ethically make in photojournalism. Yeas some of us still have ethics.

Color correction I do in photoshop curves numerically. By using the numbers in the info block to read the color temperature of a neutral color on the photo I find one within a range and that is not more than 10 points different between R G B. then I zero out on that color, and it corrects everything.

That reads like voodoo but it takes me about a minute per photo to do, and I could show it to you in five minutes. Gannett once trained their photographers to correct like that. I dont know if they still do.