For most of the year, tennis stars such as Novak Djokovic and Serena Williams tour the world wearing distinctive fluorescent clothing - but there's no place for such garments at the All England Club.
As the oldest event in the sport, Wimbledon prides itself on tradition, and ever since the tournament began in 1877 competitors have all worn white - and only white. The dress code dates back to standards in the Victorian era.
Players are said to have worn white as it was believed to show less sweat. And as a wealthy man's game, those who played tennis were keen to show off their pristine garments in a bid to look as upper class as possible, the Daily Star reports.
READ MORE: Merseyside tennis stars who've graced the courts at Wimbledon over the years
International Tennis Hall of Fame librarian Meredith Richards said it was all about being "incredibly proper". The all-white rule had almost no objectors until colourful outfits gained popularity in the 70s.
In 1972, Rose Casals was reprimanded for wearing a dress that featured too much purple - not least because it was peppered with the logo of the Virginia Slims cigarette brand, while Martina Navratilova was given an earful for having thin blue stripes on her white skirt.
The rules were simply too much for American icon Andre Agassi, who famously refused to participate at Wimbledon for three years due to his fondness for bright colours (he eventually conceded in 1992 - and went on to win the tournament).
Even now, Serena Williams continually tries to sneak vibrant-coloured undershorts into her match-day outfits while Wimbledon darling Roger Federer branded the rules "too strict" after being told off for wearing white shoes with orange bottoms a few years ago.
All in all, it's a rule organisers take very seriously, though they apparently considered dropping it following the emergence of colour TV in the 60s - as viewers would be able to tell players apart more easily. Though in the end, tradition trumped utility.
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