Things You'll Need
Instructions
Open the original color image in a photo management program of your choice, such as Picasa. Use the available black-and-white option to turn the photo into a black-and-white photo and save it with a different name.
Open the original color photo and the black-and-white photo using a paint program of your choice.
Select the area on the color photo that you want to show in color on the black-and-white photo using the "Free Form Select" option--or equivalent--in your paint program. Copy the selected area by clicking on "Edit," then "Copy."
Click on "Edit," then "Paste" on the black-and-white photo to paste the colored area into the photo. You may need to adjust or move the colored area to exactly where you want it on the black-and-white photo.
Click on "File" and then "Save As" to save the new image.