On Saturday, Arsenal secured a 1-0 win at home to Hull City.
A goal from captain Martin Ødegaard gave the Premier League leaders victory against the visitors, who were in their blue third kit.
The date of November 7 also marked the anniversary of another Arsenal 1-0 against a club that uninitiated might describe as wearing orange.
In 1970, Blackpool earned promotion back to Division 1 of the Football League and when they welcomed the Gunners to Bloomfield Road, it threw up a conundrum.
In 1967-68, Arsenal had worn navy change shirts but the FA then outlawed navy and black shirts so as avoid confusion with match officials.
Arsenal and rivals Tottenham Hotspur, who were similarly affected, had opted for yellow as their second colour, based on advice from Umbro agent Ron Goodman that it would avoid further clashes, but Blackpool’s shade fellow between Arsenal’s red and yellow.
In the FA Cup in 1969-70, they had worn white in two FA Cup games against the Seasiders but on this occasion it was decided to seek special permission to recall the navy on a one-off basis and it served Arsenal well as John Radford scored the only goal, a crucial win in what would prove to be a double-winning season.
Four seasons later, when Luton Town made their top-flight debut, Arsenal would wear white at Kenilworth Road and it would take the arrival of Nike in 1994 for them to wear navy shirts again.
