ColorBadges cydia tweak will modify badges based on the app icon colors.
To increase contrast, ColorBadges will also add an outline around the badge.
ColorBadges will colorize folder badges based on the highest numbered badge inside the folder (or the first badge if none of them are numbered).
ColorBadges supports iOS 7 devices, including your iPhones, iPads, iPod touches, and arm64 devices.
There are no settings to configure.