If you have a favorite wallpaper(s), but want to spice them up a bit and make them stand out then you will want to check out the Sodium Cydia tweak. This tweak is the ultimate wallpaper customization tweak and will allow you to choose from 16 different colors which can be incorporated into the wallpaper using 27 different blend modes.
There is a whackload of preferences in the Settings panel from the alpha transparency to intensity. Sodium really can make your favorite wallpapers even better. It would be awesome if you didn’t have to respring every time you wanted to change a preference, as it can make finding the perfect configuration difficult and time consuming, but it isn’t that bad.
If you are interested in Sodium you can find it in the BigBoss repo for $0.99.