How to Create a Red Blue Duotone Effect

Learn how to easily recreate the red/blue duotone color grading using the tone curves. You’ll learn how to do it in two ways and also learn how to create your own custom duotone colors using a straightforward method.

Although this is a Lightroom tutorial, it can in Photoshop with the Camera Raw filter (Filter > Camera Raw) or by using the Curves adjustment layer (Layer > New Adjustment Layer > Curves).