While the blonde is much more faithful to the book (which I'm assuming you're trying to go for), I much prefer you looking like this. Not only would people be able to recognize who you're trying to be but it also looks a lot more natural. But of course that's just my opinion and you should go with what you truly think would look best. Best of luck and I can't wait to see the rest of the cosplay! c:
That's good that you're going with the pigtails, they tend to suit you best. And it's good that you're trying to be faithful as possible to the books since a lot of people tend to overlook them for either the 1939 movie or the Wicked series. Needless to say that I love them both but it's nice seeing some real adaptations. c: Also, I think that the brown pigtails would follow the original book because in the W.W. Denslow illustrations she had reddish brown hair so it's still pretty legit.