Using the Auto Color command (Photoshop)

The Auto Color command adjusts the contrast and color of an image by searching the actual image rather than the channels' histograms for shadows, midtones, and highlights. It neutralizes the midtones and clips the white and black pixels based on the values set in the Auto Correction Options dialog box. (See Setting auto correction options (Photoshop).)

To use the Auto Color command:

Choose Image > Adjustments > Auto Color.