Eton blue is a shade of greenish blue[1] or bluish green[2] used since the early 19th century by sportsmen of Eton College.

Chelsea FC wore Eton blue from its founding in 1905 as the Earl Cadogan, who was the club's president and held the title Viscount Chelsea, was an Old Etonian.

They changed to their darker shade of Royal Blue in 1907.

[5][6] Eton blue is also used by Geelong Grammar School, a prestigious boarding school in Geelong, Australia, which has been dubbed as 'Australia's Eton', owing to its similarities with English public schools.

This colour-related article is a stub.