One of my favorite entertainers is the Voices of Liberty a cappella group at Walt Disney World. They perform shows inside the American Adventure under the rotunda at Epcoot’s World Showcase. The area was designed for the acoustics and the talented singers take full advantage of them. But (isn’t there always one?), the lighting for ambient light (no flash) photography is very challenging in the rotunda. The color cast is very yellow due to the incandescent lights as seen in the photo below.

Voices of Liberty BEFORE White Balance Adjustment.
Nikon D7100/24-120VR, 1/80s, f/4, ISO 6400, EV 0, 24mm focal length.

There are two ways to fix the color cast to bring it back to what our eyes see. You can take a Custom White Balance before photographing or change the white balance in post processing. Most photo editors allow you to change White Balance by either the use of sliders or by selecting a spot on the photo which should be white or gray with a dropper. Once selected by the dropper, the editor will alter the white balance based on the spot. It works very well and if not exactly correct, you can then adjust it via the sliders to your taste. That is what I did below. The spot I choose was one of the pillars behind the singers.

Voices of Liberty AFTER White Balance Adjustment.
Nikon D7100/24-120VR, 1/80s, f/4, ISO 6400, EV 0, 24mm focal length.

I use JPEG for my image size and quality so white balance works most of the time. If you use the image size and quality of RAW, adjusting white balance in post processing works even better.