Yes there is a way to change the color, but it involves taking out the screen and inserting a plastic film between the screen and the apple logo. It is not a hard process, and you shouldn't mess anything up as long as you are careful. Here is how I did mine:
First you need to order a color or design from
www.icolours.ca.
You need to remove the plastic bezel around the screen, the part that says "Macbook" on it. It pops off with a small flathead screwdriver. Next you have to remove all the screws around the outside of the screen, and fold it down onto the keyboard. You will see a white plastic film over where the apple logo is. You will need to cut this out and remove it. I used a small exacto knife to cut around the outside of the apple logo. You will then notice that there is still a film over the apple, underneath the plastic you just removed. It is up to you whether or not to remove this, but if you don't the design or color you are using will not show up very well, and may look dim or the color may not show up right. It isn't very easy to remove this since it doesn't peel off. You will need to use a dull non-serrated knife to scrape it away, making sure every last bit of it is gone. If successful there will be no scratches or marks left afterwards. Just be careful and don't press too hard. When all of this is finished you can either tape the color on over the brown cardboard like material surrounding the apple, or you can peel up the cardboard and stick the color underneath it. This is what I did since it places the color closer to the apple and it looks much better. When all of this is finished, just put the screen back in, pop the bezel back into place, and you are done.
Here is a picture of mine:
And Closed:
Good luck!