Pink lolita is a substyle of lolita focusing on the color pink.
Pink lolita is identical in every way to traditional lolita style, or sweet lolita style. However, the substyle focuses on using almost completely, or completely, pink color schemes; from JSKs to accessories to wigs.
Some consider pink lolita style to simply be Sweet Lolita, and insist that the term "pink" is unnecessary. However, the term is still used by some.