On a bike decorated like yours you need a balance of both the black and the white. I'm not sure whether going white up front would accomplish anything. I'm afraid it would look "washed out". I don't think you can improve on what you have. I would just leave it. Besides, the longevity of black tape is much greater than white. Except for minimally padded microfiber tape like Fizik's, white is almost impossible to keep clean.