Dallas Michael John Albert Green is a Canadian musician, singer, songwriter and record producer who records under the name City and Colour. He is also known for his contributions as a singer, rhythm guitarist and songwriter for the post-hardcore band Alexisonfire. In 2005, he debuted his first full-length album, Sometimes, which achieved platinum certification in 2006. City and Colour began performing in small intimate venues between Alexisonfire tours. The name City and Colour comes from his own name: Dallas, a city, and Green, a colour. His reasoning for the name was that he felt uneasy "putting the album out under the name Dallas Green".

Alexisonfire is a Canadian post-hardcore band formed in St. Catharines, Ontario in 2001. The band's members are George Pettit (vocals), Dallas Green, Wade MacNeil, Chris Steele (bass) and Jordan Hastings. The band has won numerous awards, and in Canada their albums have all been certified either gold or platinum.