Making selective colors using photoshop. (unless you have D5100 which has selective color effect already.)
1. Load your image in photoshop
2. Duplicate your Image (ctrl + j)
3. On your duplicated image, press alt + shift + ctrl + b to make it black and white.
4. Look for Quick selection tool.
5. Select your desired subject you want to retain the color.
6. After selecting, press delete to it will reveal the color.
7. Then press ctrl + D to deselect.
8. Flatten the image [ctrl + shift + e] then save it.
then you're done!
here's mine.
Before
After
EXIF
NIKON D7000
SHUTTER SPEED 1/400sec
F-Stop: F/5.0
Aperture: f/5.0
ISO: 2500
Focal length: 18mm
Lens: 18-105mm f/3.5-5.6