Number one is the white balance. While it is better to get it right when shooting, you can still recover this with the remove color cast in PhotoShop Elements. The Auto white balance in the camera saw too much blue and guessed.

Second, consider adding a backlight that is about one stop brighter than you front. Even just having one side slightly brighter than the other would help. Move one of your front lights a little farther back than the other. String backlight is not always used in product shots, but with this many elements, it will help things stand apart.