Can you tell me what other colours you've got going on in your house? Can you see other rooms from the kitchen? If so, what colour are then, and do you want the kitchen to blend or stand out? When you say your cabinets are light, do you mean a natural light wood, or do you mean that they are white/cream? What colour is the counter?
You can paint your backsplash, if necessary. I painted mine in my old house and it still looked good 3 years later when I moved out.
to add a picture, you have to first upload it onto a hosting site. Once it's online, right click on it, select properties, and then copy the URL listed (usually under the title of Location). Then, come back here, click on the little icon that looks like a tree (from the tools above) and paste the URL into the space provided.