Colour Correcting with Curves
When your colour grading needs subtle adjustments, working with curves gives you the control you need. Read more here: The Basics of Colour Correcting with Curves
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RGB
Duotone Effect in Photoshop
Try this Photoshop tip to turn photos into graphic eye-catchers. Source: Make It In a Minute: Duotone Effect in Photoshop | Create
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