Here's a non-slideshow look at an alternate or throwback uniform for each current NFL franchise. Some have popped up time and again in recent seasons, while others haven't been seen in years and may never be unveiled again.
The Cards added black jerseys to their wardrobe in 2010.
The Falcons kept their red and gray trim while switching to black helmets in 1990.
The Ravens started using an all-black alternate look in 2004.
The Bills wore navy-blue jerseys from 2002 to 2010.
The Panthers have worn blue jerseys on special occasions since 2002.
The Bears have sported orange jerseys several times between 2004 and 2011.
The Bengals introduced orange jerseys in 2004 and kept them ever since.
The Browns' orange jersey lasted from 2002 to 2004.
A double-star jersey was introduced in 1994 and last appeared in 2012.
The Broncos went to this look in 1962 and brought it back in 1994.
Black-trim-beget black jerseys in Motown from 2005 to 2007.
Green Bay Packers
This 2010-2011 throwback hearkened back to the time before plastic helmet shells.
Red jerseys have been part of the Texans' wardrobe since their second season in 2003.
The Colts donned these blue-helmeted 1950s throwbacks against Philadelphia in 2010.
The Jags wore all-black uniforms with their original helmet starting in 2002.
Kansas City Chiefs
This homage to the AFL's Dallas Texans was worn in 2009.
Orange jerseys appeared from 2003 to 2010, including on Monday Night Football.
The Viking used white facemasks and wide, yellow stripes from 1980 through 1984.
New England Patriots
The Pats' old-time white-helmet look came back in 2002 and from 2009 through 2012.
New Orleans Saints
Gold numbers adorned the Saints' white jerseys from 1996 to 1998.
New York Giants
The Giants re-introduced a red third jersey in 2004 and kept it through 2007.
New York Jets
The AFL's Titans of New York re-appeared from 2007 to 2009 and again in 2011.
Silver numbers and an old AFL patch on white jerseys were used in 2009.
The Eagles opened their 2010 campaign wearing this 1960 throwback.
The Steelers incorporated this bumblebee look in 2012.
San Diego Chargers
The powder-blue jersey with numbers on white helmets came back in 1994.
San Francisco 49ers
The 49ers began using black trim in 1994, including Super Bowl XXIX.
St. Louis Rams
The yellow-horn scheme started in 1948, and returned in both 1973 and 2009.
The original jerseys had no hawk head on the sleeves and were last worn in 1994.
Tampa Bay Buccaneers
The classic Creamsicle/Bucco Bruce look came back briefly, beginning in 2009.
This 2009 throwback uniform celebrated the AFL's Houston Oilers.
A burgundy helmet with a spear logo and matching jerseys were used in 2002.
Chronological information from The Gridiron Uniform Database.