The Leave Color Effect

1. Open 17-1.prproj
2. Drag the enters office.avi clip to Video 1 and position the CTI at about halfway so you have a good view of the desk lamp.
3. Choose Video Effects > Color Correction and apply the Leave Color effect to the clip.
4. Expand Leave Color in the Effect Controls panel. Using the eyedropper next to Color To Leave, click the blue lamp to select the color to retain.
5. Set Amount to Decolor to 100%. This turns everything but the selected color to grayscale.
6. Set Tolerance to about 36%. You might need to adjust this figure a little to get the effect you want. (figure)
7. Play the clip. Only the blue lamp is in color.