The switch from Black and White to Color only emphasizes what a great change has taken place. Dorothy steps outside into a totally different landscape than what she has known until then. She takes in the whole view and exclaims:
Toto, I've a feeling we're not in Kansas anymore.And oh, how right she is.
Go to: Alice or to Winnie,
or
Go to: Put them together and what have you
got?, or
Go to: falling straight to not being in
Kansas anymore