Red border, with a black background. Text also has a black background on the top half, with a red outline, and blue to white color transition on the bottom half.
Tron was a movie from 1982 that starred Jeff Bridges and Bruce Boxleitner. The movie plot centers around Bridges, who gets "sucked" into a video game and is made to fight in gladiator-like games to win his freedom. This button, along with other versions, was designed to promote the movie when it opened in theaters.