5 Color names for "Ireland"

Erin is a color that is halfway between green and spring green on the color wheel. It is named after Erin, a poetic name for Ireland. One of the earliest known uses of the word "erin" to describe a color appears in the poetry of Jane Johnston Schoolcraft (1800–1842). In a poem titled To the Pine Trees, Schoolcraft reflects on her arrival back to North America after spending years in England she writes "Not all the trees of England bright, / Not Erin's lawns of green and light / are half so sweet to memory's eye, / As this dear type of northern sky."

Kelly green is an intense, pure green named after the common Irish family name, Kelly. It evokes the lush green Irish meadows and is also commonly associated with St. Patrick’s Day.

Celtic blue is a shade of blue, also known as glas celtig in Welsh, or gorm ceilteach in both the Irish language and in Scottish Gaelic. Julius Caesar reported (in Commentarii de Bello Gallico) that the Britanni used to colour their bodies blue with vitrum, a word that means primarily "glass", but also the domestic name for the "woad" (Isatis tinctoria), besides the Gaulish loanword glastum (from Proto-Celtic *glastos "green"). The connection seems to be that both glass and the woad are "water-like" (lat. vitrum is from Proto-Indo-European *wed-ro- "water-like").

British racing green, or BRG, is a colour similar to Brunswick green, hunter green, forest green or moss green (RAL 6005). It takes its name from the green international motor racing colour of the United Kingdom. This originated with the 1903 Gordon Bennett Cup, held in Ireland (then still part of the UK), as motor-racing on public roads was illegal in Great Britain. As a mark of respect, the British cars were painted shamrock green. There is no exact hue for BRG – currently the term is used to denote a spectrum of deep, rich greens. "British racing green" in motorsport terms meant only the colour green in general – its application to a specific shade has developed outside the sport.

Shamrock green is a tone of green that represents the color of shamrocks, a symbol of Ireland. The first recorded use of shamrock as a color name in English was in the 1820s (exact year uncertain). This green is also defined as Irish green Pantone 347. This green is used as the green on the national flag of Ireland. It is customary in Ireland, Australia, New Zealand, Canada, and the United States to wear this or any other tone of green on St. Patrick's Day, 17 March. The State of California uses this shade of green of the grass under the bear on their state flag. The Boston Celtics of the National Basketball Association use this shade for their uniforms, logos, and other memorabilia.