Línea Negra (dark line)

So have any of you had some visibility of the Linea Negra also known as dark line on your tummy? I noticed it last week. Was meaning to post it but kept forgetting. I found it Sept. 2nd it's noticeable in the bottom section of my tummy. But I know that prior times it goes all the way to the top. I am 15 weeks and just thought it was too early lol but it's nice to see it.