That is according to a report by The Sun, who claim the Eagles like Colwill and see him as a long-term project.
It is said that Everton are keen on the 19-year-old, with Frank Lampard hoping he can add to their backline with a loan move for the starlet.
The competition from Lampard could cause a hurdle for Vieira, with the report claiming that Crystal Palace may not be able to offer the young defender regular first-team football next season.
Chelsea’s loan policy of late has worked well for the club.
This season has seen the likes of Colwill and Gallagher announce themselves to the footballing world, with some tremendous displays from both youngsters across their different spells.
The former has spent the season on loan at Huddersfield Town, where he has enjoyed regular first-team football in a campaign that has taken the Terriers to the Championship play-off Final.
He’s featured 29 times for Huddersfield this season, starting 57% of games and amassing two goals and one assist along the way. In the process, he has been hailed on a regular basis, particularly by scout Jacek Kulig who called him both “outrageous” and a “huge talent.”
For his first season in professional football, it’s an impressive return for a 19-year-old, so you can understand the level of interest that surrounds him.
The aforementioned Gallagher’s progress in his loan spell at Selhurst Park is a worse kept secret and has seen the 22-year-old flourish in the Premier League, scoring eight goals and assisting three in 34 appearances for Vieira’s side.
Having signed Chelsea youngster Guehi, the Palace boss will greatly understand the potential of Cobham prospects and could move for Colwill in a deal reminiscent of Gallagher’s loan move.
For Palace, Colwill could become a Gallagher 2.0 with the style of this move and, being a natural left-footer, could fit more naturally at left centre-back than the likes of Marc Guehi and Joachim Andersen who are both right-footed.