If you've had your hair dyed recently like I have (unless you've done it blonde, which is not dying it's actually bleaching it so it doesn't really fade <-- sorry for this...I'm ranting now), I doubt that you want to color to fade.

There is one way that I know that can help prevent that from happening:

You can use a deep-conditioning treatment every month, once a month. It'll help lock in the color and it can benefit by staving off dry and damaged locks. Or you can use a conditioner, which usually comes with the dye itself, which can be used weekly for up to six weeks.