Smurfs don't appear to change color when they are sad.
white
Papa Smurf
The main female Smurf people think of is Smurfette, a main character. But there are two other female Smurfs: Sassette Smurfling and Nanny Smurf.
In a webserch there doesn't appear to be any such Smurf named Lily, so I'm going to say No since she doesn't seem to exist.
The Smurfs do not possess "magical" superpowers as such, like the ability to fly or x-ray vision, but they do all have different skills which they use within their community and which is refelcted in their names, e.g. "Reporter Smurf", "Tailor Smurf" and "Farmer Smurf".
Smurf Blue
um probably not but first off whats smurf meat
Papa Smurf is the only Smurf to wear a red hat.
blue
blue?
white
Purple.
Brainy Smurf, Grandpa Smurf and Nanny Smurf
Brainy Smurf, Papa Smurf & Smurfette. (:
A smurf that delivers mail
Baker Smurf
It becomes a brighter shade of blue than usual. However, I do not recommend choking a smurf considering the smurf police will likely arrest you and stuff you in a prison cell that is "smurf sized", and therefore is way too small for a human being's comfort.