irelands flag is 3 colors what do those colors mean?
and in the lyrics blow is t refering to southern vs northern ireland?

Irish Rovers Lyrics - The Orange And The Green Lyrics

Oh, it is the biggest mix-up that you have ever seen.
My father, he was Orange and me mother, she was green.

My father was an Ulster man, proud Protestant was he.
My mother was a Catholic girl. From county Cork was she.