How Green is Your Shamrock?

While most any green will do, there really are a few specific shades of green that say "Happy St. Patrick's Day." Which one do you prefer? As you start crafting your lucky leprechaun greeting cards and decorations, or shamrock-adorned Web pages give a thought to the colors of St. Patrick's Day. And if you want to use the national flag of Ireland in your projects there are specific shades of green and orange you'll need.