Given just how often people use their Lock screen clock to see what time it is, it’s a shame that Apple doesn’t give users visual customization options to tailor its looks around the user's personality.
Nevertheless, those with a jailbreak can use a new free jailbreak tweak dubbed Vibrancy (iOS 10) by iOS developer NeinZedd9 to make the Lock screen clock text subtler, giving the illusion that the time is fading away into the wallpaper.