1. Open your image and create a new layer
2. Add new layer mask
It should look like this.
3. On the masks panel choose color range
4.Select once inside the object that you want in order to sample it’s color
5. Now Choose the middle dropper tool with the plus sign.
6. Now click all over the object until you see it completely filled in white.
You will notice this also brings out some things you don’t want such as the hair in this picture. We will take care of that in the next step.
7. Now go to your layer mask and choose “alt+click”
8. Then grab the quick selection tool.
9. Now with the image inverted drag the selection tool through the area that you want selected. In this case I am selecting only the shirt.
10. Now choose “Inverse” from the “Selection” drop down menu. This will now highlight everything but the shirt.
11. Now go back to the layers panel and make sure you click on the image and not on the layer mask.
12. Now simply hit “Delete” on the keyboard. This will delete everything but the shirt.
13. It should look like this once you hit delete.
14. Now choose Hue/Saturation from the image/adjustments menu.
15. This is where you can start adjusting the sliders and playing with the colors.
16. To further enhance the color you can go to Levels from the Image/Adjustments menu.
17. Adjust the levels back and forth to get the desired look.
18. Now you can turn back on the underlying layer and see your finished product.
I chose to add a white background layer to get a feel for what my image will look like when placing it in the header that I have in mind.