This is a video tutorial of how to adjust the color for the card templates we make. I am showing this in PSE6 but the same can be applied to photoshop7 and above.

Here are the written steps …
-open your template
-select the layer you wish to change color to
-select adjust color tab
-go to change hue/saturation
-adjust hue/saturation to your liking
-click ok
-you are done