B&W Background

One method of changing the background of a photo to black and white while leaving the center of interest in color:

Create a new adjustment layer >>> Hue/Saturation

Turn the saturation down to 0. This will produce an entirely greyscale image.

Now, select the adjustment layer, grab your eraser tool and erase away the portions of the layer you wish to be in color. Use a feathered brush to make the edges less hard.

Three other methods:

• a) Duplicate our layer and convert it to grayscale, then select the subject and remove it to let the color version show through.
• b) Carefully select then copy the subject, then convert the whole image to grayscale, then convert back to RGB, and paste the color subject back in, or,
• c) carefully Select the subject, then choose Select > Inverse and invert the selection to encompass the background, then use the Hue/Saturation feature to desaturate the whole backgroud to black and white.