Color in Black & White Picture
Step 1: Open up your image and duplicate it. (ctrl+j)
Step 2: Go to Select >> Color Range & choose the color which you want. Adjust the Fuzziness as per your choice.

Step 3: Now hit the quick mask button ;

Step 4: Select the background layer then go to Image >> Adjustments >> Gradient Map & select the black & white gradient;

And that’s it! Here’s the final image ;



