If everyone will check John's model photos he just posted with his new Nikon they illustrate one point I mentioned in my post yesterday.
While they are good shots of an excellent model, the white balance setting needs to be improved.
John it looks like you shot the photos under incandescent lights. The auto white balance from your Nikon corrected some but not all of the color shift that occurs with incandescent lights. The photos still have a brownish-cast to them which I imagine doesn't quite show the model's camo colors exactly right.
I imagine, as Don suggested, the photo editing software you received with the camera can fix it simply enough.
Without getting too technical, all light sources illuminate at different color temperatures. That's a fancy way of saying that light sources add a cast to the color of a photo. Our brains adjust for the color changes so we normally don't notice them, but cameras don't have brains (not yet anyway) so they "see" the color cast. Photographers have to "train" their brains not to compensate for the color shift so they know how to correct for it.
Since human brains are wired to see mostly under daylight conditions, cameras are set-up to render colors most correctly under "daylight" conditions. Daylight casts a very blueish light that cameras, like human brains, see as "normal." When daylight isn't the photo's primary light source, the camera's white balance must be adjusted to compensate for the different color cast. This can be changed in the camera for the original image capture, or in photo editing software with something that adjusts or changes the color cast.
In the old film days this was quite a problem and required color correcting filters screwed onto the lens barrel or using a film balanced for the different light sources. Anybody remember seeing "DAYLIGHT OR BLUE FLASH" marked on film boxes when you were younger? That's why Prof Tilley mentioned blue photo flood bulbs. All these methods were required to get that blueish daylight colorcast on the film when you weren't shooting in daylight.
Does anyone remember super 8 movie film when you had to buy "outdoor" or "indoor" film. The old indoor film was formatted to shoot under those hot, bright lights that were used when filming inside. That film was set to compensate for the reddish-brown light cast of incandescent bulbs.
So with a daylight set-up photos shot under incandescent light will look like John's photos taken with his new camera.
If you care to see how blue daylight is, set your camera for an incandescent white balance and take a shot or two outside in sunlight. Or try a shot lit with sunlight through a window. The photos will definitely look too blue.
Does all this matter? Most of the time, nobody will notice. But if showing you used the correct paint colors on your model matters, it can.
Digital photography made this simpler, but it is still there.