Fans attending this year’s Battle for the Iron Skillet will need to pay attention to two things besides the game itself: their clothing and their seat number.

TCU will try to “color block” a game for the first time Sept. 28, when TCU battles SMU at Amon G. Carter Stadium.

The event, called “Color Block the Carter,” asks fans to dress in purple and white depending on where they’re seated inside the stadium. On Twitter, TCU Athletics posted a map indicating what color each section should wear.

The goal is to create an alternating pattern of purple and white in the stands.

Jackie Torda, assistant director of athletics marketing, said “Color Block the Carter” gives fans the opportunity to be more engaged with the game.

Torda, a former member of the university’s women’s soccer team, said fan participation encourages student-athletes.

“It definitely could kind of be a hype, or uplifting for players to look up and see like, ‘Oh, all our fans are here. They color blocked the stadium.’ I think it is encouraging,” she said.

The university had a similar promotion in 2012 at the Frogs for the Cure game against Kansas State. But instead of a color block, it was a blackout, with fans wearing black to promote breast cancer awareness.

Color blocks and blackouts are not uncommon at other universities. Texas Tech has an annual blackout game. This year’s was Sept. 7 when Tech played TCU. On a professional level, Miami Heat fans are known to participate in “whiteouts,” wearing white to basketball games.

If the university’s first color block is successful, Torda said, the university can expect more color-blocked athletic events in the future.

“This game for the color block will kind of be the first test to our fans if they can make it work,” she said. “And if they participate, then it’s definitely something we would want to keep moving forward.”

TCU will play SMU Saturday, Sept. 28 at 11 a.m.