well when i first started the game i was a more pale white but now i have a darker skin tone not black but brown. well it can obviously change but why and how?
You've tanned!
The more you stay out during the summer months without a hat or face accessories, the more you tan.
If you don't like it, don't worry, you'll lose it. ^^
I've heard that you'll start tanning at 15 minutes a day in the summer or on the island. If you don't want to tan, there is a list of wide-brimmed hats that will prevent tanning. It's not all the hats though, just the wide brimmed. Umbrelllas will also stop the process, and I think that headgear will as well. I didn't notice I was tanning for a long time, but when I did notice, I didn't like it. The hats made a difference pretty fast.
I always wear a hat, too, because I love hats and I've never tanned. It would be funny to get tan arms and legs and have a white head, tho, even if only for an hour or so. Oh, the pics I would take! Lol!