Quote Originally Posted by Leo_Ames View Post
But your hypothesis seems to make sense if it wasn't always that way if you're the original owner of it. If you just picked it up and are wondering if it's going to start yellowing due to what you've noticed, I wouldn't worry. It could just as easily be that both halves of your console are from different manufacturing runs which could account for the slight variation in the coloring of both halves.
I'm not the original owner of the console, so I'm not sure how it looked back in the 90's. I'm leaning towards it being a production run thing (I think you see the problem of one half being darker than another with a lot of SNES game carts, too, so maybe this is the exact same issue). Here are some pics of my SNES so you can see what I'm talking about:

Front

Side

Controller port

As you can see, the bottom isn't really yellowing (I'm assuming that the top half is closer to the color of the original SNES), but it's still somewhat noticeable.