No need to adjust your television sets. Those are gold numbers at midfield in NFL exhibition games.
Throughout the preseason and regular season, NFL fields will have gold 50s at midfield. It's to commemorate the 50th Super Bowl, which will be played next February in Santa Clara, California.
The rest of the numbers on the field will remain white.
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The league is also dropping Roman numerals for this Super Bowl, which simply will be Super Bowl 50. Midway in the season, the celebration of a half-century of Super Bowls will also include sideline apparel with gold trimming.
Pro Bowl uniforms will be tinged in gold, and every Super Bowl rematch on the 2015 schedule has been highlighted on the NFL's website in - you guessed it - gold.
AP NFL website: www.pro32.ap.org and www.twitter.com/AP-NFL