Let me add that, I have heard Tara's voice before and let me ask, have you seen Tara Strong before? Tara is white, a Canadian by birth if I may presume. Twilight doesn't sound dark to me at all. If anything, she sounds white. The darkest I could imagine her is maybe Hispanic tan...

...all that said: she's a pony anyways. It hardly matters what our opinions of what she would look like human: she's not even human in the first place. I'm happy that a person like yourself is able to imagine and that that imagination has let to a personal logic of Twilight being dark. Congratulation...

...My personal logic will still see her as white: no matter your argument.