The Gunners have donned white shorts with their famous red jersey ever since the 1970s.
But they have turned back the clocks for this evening’s New Year’s Eve clash against West Brom.
And it has caused confusion from Arsenal fans on social media.
One fan said: “Arsenal don’t look right in red shorts and socks.”
While another was initially confused by the kit change: “I got baffled when I switched the game on & saw @Arsenal playing in red shorts.”
But the kit change comes down to a very bizarre reason.
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Arsenal have reportedly been forced to change to red shorts due to a possible clash with West Brom’s kit.
That is despite there being no issues in recent years with Arsenal visiting the Hawthorns.
And there was no need for the red shorts in the reverse fixture earlier in the season with both teams in their usual home kits.
Arsenal opted against mixing their home kit with their away and third kits.
Instead, they are wearing red shorts that won’t be available to buy.