There were a number of 19C. "Orange meets Green" songs and recitations. Sparling's "Irish Minstrelsy" has an impossibly long called "Orange and Green", written by Gerald Griffin. I think Thomas Davis of The Nation wrote one also - but don't have it to hand. "Blue cockade" sounds odd - green cockades were a badge of nationalists from early 19C., as far as I know."Easter lily" would make it much later.

Regards