Changes in the uniform reflect feedback we have received from customers and staff
The new uniform is darker blue and features design improvements implemented following consultation with LU's train and station staff.
Every five years a new LU uniform is produced.
The latest update takes advantage of improved fabrics, as well as incorporating modern designs, such as a fleece and polo shirt.
Piccadilly line General Manager Mike Challis said: "London Underground is working hard to improve the Tube, to make it safer, cleaner and more reliable.
"Customer surveys suggest that customer satisfaction is on the increase, although we accept that there is still room for improvement.
"We value our staff at London Underground. I know how hard Piccadilly line staff work, every day, to provide a 'Good Service' to Tube passengers.
"Changes in the uniform reflect feedback we have received from customers and staff.
"I am very pleased that we were able to work closely to produce a new, smart and professional look for Tube staff.
"I hope the new look is appreciated by both passengers and staff alike."
The new uniform will be distributed to all of LU's 8,500 front-line train and station staff by July 4.