As you can see the Animation uses the original Shuriken
Even though as you can clearly tell its a different color on his back: http://imgur.com/a/w4LsY
(I'll add all the Chromas doing it SoonTM)
theArtifacts1 votesPretty sure they didn't apply chromas to particles to keep their cost down.
Guy Fox Teemo1 votesThat wouldn't be adding any particles? IT makes zero sense that he has a Different colored weapon but when he uses the weapon it doesn't use the weapon.
It would take zero work other then switching out the color he uses instead of the base one.