This is an example of how colors in a photograph may be changed merely through the use of lighting.
The difference in color between the above two photos is NOT the result of Photoshop corrections.
Instead, color in each image is "as shot" and the result of the ambient lighting at different moments.

Digital photographers have often gotten used to "achieving their visions" via Photoshop - or similar - after an image was taken.
However, many of the effects - that one can achieve via post processing - can also effectively be achieved In-Camera while shooting the image.
As a photographer (not a digital artist), I prefer to do as much as possible myself in-camera.
These two images (shot minutes apart) are an example of how
Natural Lighting can effect both color and photo "mood" WITHOUT having to later make any changes in Photoshop.