Her nails are short which means there is no free edge so the colour change tends to be all one colour. If you look below then you can see on the pinky finger nail has a teeny free edge which is a different colour. With a longer nail this polish would give a French manicure look to the polish.
Quick demonstration of Ylin's mood nail polish in shade 15. It changes colour based on 'mood' however this is really due to temperature as you can see. A very quick colour change too!
I got this from BornPrettyStore for $7.84