First, after the Wicked Witch sees the ruby slippers disappear from the feet of the Wicked Witch of the East, there is a rare instance when the feet of the Wicked Witch of the West pop out from under her very long dress. She is wearing black pumps, and you can see that her feet are normal flesh tone!

Also, when she walks down the stairs into the melting room, she lifts up her dress so she wouldn't trip, and you'll see that her legs are also normal flesh tone.