66 Duotone Color Effect Photoshop Actions. Use these templates with only one click to create stunning duotone color effects on your photos, Products, illustrations, and designs like Spotify's main arts. Inside this pack, you will find a Photoshop action file (.atn file ) that contains 66 actions + an Awesome mood board to preview all images before applying any effect to your final images. It's non-destructive, and it leaves your original image untouched. You can customize the colors, saturation, and contrast easily if you want to modify it.