This is a CGI effect that you can do in reality by only using ONE rubber band.The performer has a red rubber band in his hand. The color of the band will change slowly after the finger crosses the band.
What do you get?
Noted 2.0 Red by Gary Jones and Magic Tao
Chris Angel Mindfreak Magic Card Case
Time Stands Still (Gimmick + DVD) by Dexter
Quartet by Mark Mason
Svengali Deck (Bicycle) (Green)
ASH by Pen & MS Magic
My Rebus
Red Button (DVD and Gimmick) by Laurent Mikelfield