Two things comes to mind:
1) What is white in a photo (if anything), and does it look "white"? This indicates something about the brightness level.
2) If the brightness is ok, is there a desirable, or undesirable light color to any colored surface?
What happens in real life, sunlight reflected onto white paper would end up looking more yellow'ish, while an overcast sky, with mainly blue'ish light, will tend to reflect onto white paper with a blue'ish tint. Certain types of artificial lighting may cast some other hue onto whatever is lit, or reflected by that light.
A problematic situation, would be, if you have a model lit by strong light, or basically, light that itself has been colorized by say being reflected off a red colored table surface.
Photos can easily be tweaked to remove undesirable colors in an image editor.
Something I've learned from my pocket camera, is to avoid zooming in on a model to fill the screen, because, somehow, the camera seem to get more blurry towards the edges, so instead I can just keep the model around the center in the camera, and then save a large resolution file, and crop away the surrounding area in the photo.
18. February, 15:35