Of course, green is in the mix, but the St. Patrick's Day color palette has some surprises too
Green might be the first color that comes to mind on St. Patrick’s Day, and for good reason. We picture Ireland’s rolling green hills, shamrocks and four-leaf clovers and, of course, little leprechauns decked out in their holiday best. But believe it or not, green isn’t the only St. Patrick’s Day color, and it wasn’t even the original shade linked to St. Patrick. We know—mind blown!
Like green, the holiday’s other hues go back centuries and are deeply connected to Ireland’s culture, religion and politics. To unpack it all, we spoke with Cian T. McMahon, PhD, a historian at the University of Nevada, Las Vegas, and an expert in Irish and Irish American history. Read on for a closer look at the St. Patrick’s Day colors and the fascinating stories behind them.
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What are the St. Patrick’s Day colors?
In addition to green, the St. Patrick’s Day colors include white, orange and blue. Yes, really! In fact, according to historians, blue was the first color associated with the holiday, long before green took over the celebration. (More on that in a minute.) Over time, green became the dominant color of Irish nationalism, and eventually the one most people wear on March 17. Shades like emerald green came to symbolize Ireland’s lush land, kelly green was tied to national pride, and lighter spring greens often represented renewal and luck.
How do white and orange factor in? They’re the two other colors that appear on the modern flag of Ireland, of course! That flag, first introduced in 1848, uses green, white and orange to represent different traditions on the island. Green represents Irish Catholics and nationalists; orange is associated with the Protestant community (named for William of Orange); and white symbolizes the hope for peace between them. Blue, meanwhile, has a direct connection to St. Patrick, as well as medieval and early modern Ireland.
Why did blue stop being the official color of St. Patrick’s Day?
First, let’s start with how St. Patrick became associated with blue. Some of the earliest known depictions of St. Patrick, including in 13th-century manuscripts, show him wearing blue robes. And the Order of St. Patrick, established in the 1780s, used a light blue, known as St. Patrick’s Blue. The color also became tied to Ireland when Henry VIII claimed the throne and brought it under English rule. “The 16th-century Kingdom of Ireland flag features a golden harp on a blue field,” says McMahon.
Over time, that association became complicated. Because many of these symbols were tied to British rule, blue gradually lost its appeal among Irish patriots, who began embracing other colors that better reflected Irish nationalism.
That doesn’t mean blue has disappeared entirely, though. You can still spot it in certain Irish flags and historic depictions. Think of it as the “original” St. Patrick’s color that got overshadowed by green.
How did green become the dominant color of St. Patrick’s Day?
Green grew out of a very specific moment in Irish history. “Green became associated with Irish nationalism during the United Irishmen Rebellion of 1798,” says McMahon. “It was a way for Irish Catholics to assert their identity and claim equal rights.”
From there, the color spread far beyond Ireland. During the 19th century, waves of Irish immigrants moved to places like the United States and Australia, and they brought their traditions with them. Wearing green, carrying green flags and decorating with shamrocks became visible ways for Irish communities abroad to celebrate their heritage on St. Patrick’s Day.
There are also a few cultural reasons the color stuck. Ireland’s famously lush landscape earned it the nickname “the Emerald Isle,” and green later appeared on the 1848 national flag of Ireland. Add in the well-known legend that St. Patrick used a shamrock to explain the Holy Trinity, and by the time modern celebrations rolled around, green had become the holiday’s unmistakable color.
Is it offensive to wear orange on St. Patrick’s Day?
Wearing orange on St. Patrick’s Day isn’t technically offensive. However, it’s generally discouraged due to a historical divide: Green represents Irish Catholic tradition, and orange represents Protestant loyalists. “The Irish who wished to remain part of the United Kingdom, known as loyalists or unionists, adopted orange as their symbolic color,” explains McMahon. In fact, one of the most popular fraternal associations for Irish loyalists is called the Orange Order.
Because of this, orange was rarely used in St. Patrick’s Day parades, especially in the 19th-century United States. According to McMahon, “British loyalism was unpopular with the Irish Catholics organizing Saint Patrick’s Day parades, and with their American hosts, who had fought for independence from Britain.”
Despite their complex history, both colors appear in the Irish flag to symbolize peace between the communities. If you want to include it in your celebrations, pair it with green and white as part of the full Irish-flag color scheme.
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Sources:
- Cian T. McMahon, PhD, professor of history at the University of Nevada, Las Vegas, and author of The Global Dimensions of Irish Identity: Race, Nation, and the Popular Press; email interview, March 9, 2026
- History.com: “History of St. Patrick’s Day”
- Smithsonian Magazine: “Should We Be Wearing Blue on St. Patrick’s Day?”
- KTBS: “Orange Irish: Why some prefer orange to green on St. Patrick’s Day”
