Kuro Lolita (黒ロリ) is a Lolita outfit made entirely of black clothing. The wearers often pair themselves with Shiro Lolitas in twin outfits to create an interesting contrast.
The style was originally born in pre-print times in order to differentiate all-black Sweet Lolita coordinates from Gothic ones, but there are instances where Kuro Lolita is mistakenly used for black outfits regardless of style.
Kuro also follows the same guidelines of most of the other Lolita styles, so is still fairly easy to pull-off for beginners.