Strict rules governed what was and what wasn't permissible in terms of colours and patterns. Goalkeepers in particular, until the rules were relaxed in the 1970s, were limited to green, blue, scarlet and white tops except for international matches, where yellow or black was the colour of choice following a ruling by the International Football Association Board (IFAB) in 1921.
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By the 1970s goalkeepers in the United Kingdom began spreading their wings with regards to the colour choice of their jerseys, coinciding with the introduction of colour television sets. Keepers such as Chelsea's Peter Bonetti, QPR's Phil Parkes and Ipswich Town's Paul Cooper regulary wore a red shirt rather than green, even when there was no colour clash. Cup finals in particular seemed to give goalkeepers to the incentive to break from the norm and add a dash of colour to proceedings. In 1974 Wolverhampton Wanderers' Gary Pierce wore red in their League Cup victory over Manchester City while Alex Stepney wore a blue goalkeeper shirt in 1976 when Manchester United famously lost to Second Division Southampton in the FA Cup Final. Two years later, Cooper wore red when Ipswich beat Arsenal at Wembley in the same competition but it wasn't until 1984 that another goalkeeper broke ranks, with Steve Sherwood wearing the same colour when Watford succumbed to Everton (he apparently wore it to keep Graham Taylor's wife, Rita, happy as she preferred the all-red outfit).