It means that you are protestant Irish or Scotch/Irish instead of Catholic Irish and your heritage is probably from Northern Ireland.
In Ireland green is understood to mean the Catholic tradition and orange to represent the Protestant. The Irish national flag bears those colors.
The Irish flag or tri-colour consists of green, white and orange. Whilst most people wear green, it is just as acceptable to wear white or orange.
It is traditional to wear green for Saint Patrick's Day.
As I understand it Orange was the color that was used to represent Sir William of orange an Irish Catholic hating protestant. I have never seen or heard of anyone wearing orange on St. Patrick's Day.
It means your green stuff wasn't clean.
they wear green
Shamrocks are not orange.
You can wear whatever colour you want on St. Patrick's Day.
wear green
they were green
Wear green
They wear Green.
There is no part of Ireland where it is illegal to wear green on St. Patrick's Day.