What is the St. Patrick's Day color?

Green is the traditional colour worn for two main reasons:

• Green is the colour of the shamrock, Ireland's 'flower' or symbol and has therefore been adopted as the national colour.
• Ireland's poetic name of the 'Emerald Isle' probably comes from its appearance from the sea as a predominantly green land.

All other references to green are likely to derive from one or both of these facts.