Well, this has been a long time coming...
Celia Bowen from The Night Circus by Erin Morgenstern. This is when she is auditioning for the role of the Illusionist for the Circus. Wanted to get fancier, but deadlines and the fact that I can't animate for this contest anyway means the fancy stuff (read: she literally changes the color of her dress by magic) will be done for fun later xD She's described as wearing neatly pinned brown curls beneath a small black hat with feathers that is otherwise unremarkable, a deep green strapless and sleeveless gown, and a puff sleeved jacket that she removes when the director complains she could hide stuff in it. But since the part I want to elaborate on is the part where she literally changes the color of the dress from green to black and white (to match the color scheme of the circus) by magic, I decided not to add in the jacket.
Base from Silindor