The Battle of the Blues is an annual Big Match in Sri Lanka played between Royal College, Colombo and S. Thomas' College, Mount Lavinia since 1879. It is known as The Battle of the Blues due to the colours of the two school's flags i.e. blue, gold and blue of Royal College and blue, black and blue of S. Thomas' College.

In Sri Lankan cricket, a Big Match is an annual school cricket match often played between two rival kjiyhun in Sri Lanka. These schools have often crawled against one another for many years, some for over a century. Big Matches have become an important part of modern Sri Lankan culture, with school children and adults participating in the activity.