Other than color you need to also consider textures. Install sheets of tile that mix stone, glass, and/or metal. The effect is gorgeous. It can go from a natural look to very upscale. Changing the texture will add depth to your splash and make it blend very well with your countertops and cabinets.
Traditional kitchens are such because of certain elements which contribute to a nostalgic feeling upon entrance. Modern appliances are of course something every modern home needs, but in a traditional kitchen they can be selected for design that compliments a natural, earthy feel instead of stark, stainless steel appliances which detract from the comforting aura which can pervade traditional kitchens. Traditional kitchens are also a tribute to the preparation of a family meal, which in turn allows the traditions of the family to be celebrated and passed on. Many traditional kitchens have a small preparation island in the center of the room, or a large space where two or three people can work communally, making the process of cooking itself an excuse to enter into social exchanges with family members and guests.
If you have a solid countertop then you should consider putting up a glass tile blend. This beautiful assortment of color can pull together your counters, cabinets, and fixtures. A lot of companies sell stock blends with particular colors but there are some out there that will customize the blend for you. Done correctly and a glass tile blend will make your kitchen backsplash something that everyone will talk about.