Photoshop Curves does more than change highlights and shadows
Photoshop’s Curves has long been associated with making images brighter or darker. But few people know that it can also change color with greater degrees of control than the Hue/Saturation or Color Balance controls.
From slight selection changes to creating great duotones, Curves is a powerful tool to master… if you’re willing to practice.
Read the full article I wrote at Webdesigner Depot.
Related: Examples of coloring with Curves
Above: Using Curves to create a precise duotone from a grayscale photo.
Above: Curves is a grid of before & after. The horizontal axis represents an image’s current values; the vertical represents change.