"The Blue Cockade," as a political campaign song (c. 1830) supporting a fellow named Burton, sung to the "White Cockade," is one of several cockade songs in the Bodleian Collection.
I wonder if he won. Would he have been what is called a Tory? (Sorry, don't know much about English political history).

The Blue Cockade is cited as an alternate title for "The Inconstant Lover," but I haven't seen that version yet. More than one inconstant lover?
In the green laurel song, green joins violet or other colors and there doesn't seem to be any consistent pairing. Impossible to tell what the significance of orange and blue is. Perhaps, as Malcolm suggests, bad taste in clothing.