The logo for the 2012 Olympics has been unveiled in the most significant move since London won the Games.



The jagged emblem, based on the date 2012, comes in a series of shades of pink, blue, green and orange and will evolve in the run-up to the Games.



"This is the vision at the very heart of our brand," said London 2012 organising committee chairman Seb Coe.



"It will define the venues we build and the Games we hold and act as a reminder of our promise to use the Olympic spirit to inspire everyone and reach out to young people around the world.



"It is an invitation to take part and be involved.



"We will host a Games where everyone is invited to join in because they are inspired by the Games to either take part in the many sports, cultural, educational and community events leading up to 2012 or they will be inspired to achieve personal goals."



What do you think of the logo?



