West Ham are in the process of laying a new claret pitch surround to help ensure the London Stadium "truly has the look and feel" of the club.
The club-branded design replaces the green track cover that has been in place since the stadium opened in the summer of 2016.
The new feature has been installed this week and will first be seen on a match day when Leicester are the visitors in the Premier League on Saturday.
The club says the pitch surround is in line with fan feedback to improve the match day experience.
West Ham Vice-Chairman Karren Brady told the club's website: "This is wonderful and long-awaited news for the football club and our supporters.
"London Stadium is globally recognised as the home of West Ham United, and therefore it is only right that our traditional club colours are in prominent and key areas of the playing arena.
"With 60,000 supporters in attendance at every Premier League fixture, a third stand named in honour of one of our greatest ever players, together with the new pitch surround, we have a stadium that truly has the look and feel of West Ham United."