I was light skin untill age 9 when i played outside too much then i became super dark then became brown. The light skin never returned since.
I originally thought my light skin theory was me fucking with my head, "how can i tan without my skin coming back? All the pictures of me when i was younger just have really spot on lighting".
Then, my Hoyo's old friend came over. She committed on my skin tone saying wtf happened he got so madow yet your so cadaan (to my mom.) My hoyo laughed it off saying i was light untill i hit puberty, and that my abo being really madow is part to blame, confirming my brown skin hypothesis.
So yeah that's how i am brown now.