Difficulty: Moderately Easy
Step1
With a photo open in Photoshop, look over at the toolbar at the left of your screen.
Step2
Choose the background eraser tool (the background eraser might be underneath your eraser).
Step3
Click on a section of the background you wish to erase. Now click again holding down the alt key. This samples the color you wish to erase.
Step4
Now drag your cursor along the area you wish to erase. Only the color you sampled will be deleted.