Photoshop Auto Color Correct

Select “new curves or adjustment layer” from lower right menu.

Select “curves” or “level.”

Click the “flyout” 3 bars thingie and select “auto options.”

Click “find dark and light colors.”

Click “snap neutral midtones.”

If that’s not perfect, select grey eyedropper from properties and a gray point on picture.

Fantastic video at:

https://www.youtube.com/watch?v=B-W44JJToG8