What about places that have natural lighting sources that are different colors? Consider this hotel room with blue sunlight streaming into a room with orange-ish incandescents?

There are a lot of options, but the simplest involves eliminating one of the lighting sources.  Simply closing the blinds could be a solution! Or turning off the incandescents.

In either scenario, having just one color of light means the camera can adjust; it's a much better situation than the half blue, half orange scene at right.