San Francisco 49ers fans are taking a stand against plans to install green and blue seats in Bay Area Rapid Transit cars.  

The colors are also those of the Seattle Seahawks, who beat the 49ers in January's NFC Championship Game.  

Now, a fan has started a petition on Change.org demanding BART to change the seat colors.  

The petition claims that the Seahawks are "the chief rivals" of the 49ers and that using their colors would be an "outrage and a slap in the face" of 49ers fans who ride BART.  

So far, the petition has earned over 15-hundred signatures.