Hi, I Am 25 Years Old(male) And My Bottom Lip

Hi, I am 25 years old(male) and my bottom lip is very pinkish in color. I have little exposure to sunlight and once doctor told me this change in my lip color is due to vitamin-D deficiency. I use Neosporin every night to prevent crackings and dryness but, color is not getting changed. I quit smoking 6 months back but this change in my lip color was there before I started smoking. Please suggest me what should I do to get my lips back to normal.