What does 'pied' mean in the Pied Piper?

I've looked in two dictionaries:

"having sections or patches colored differently and usually brightly" - WordNet

"of two or more colors in blotches; also : wearing or having a parti-colored coat" - Merriam-Webster

"Splotched" according to the Reader's Digest Universal Dictionary.

Pied (adjective) meaning patchy in colour; splotched; piebald (Middle English, from pie, magpie) from its piebald colouring.

http://dictionary.reference.com/browse/pied

The origin of the word lends to it meaning black and white. It comes from Middle English, "pie" being used for "magpie", which has black and white colouring.

"Pied" wouldn't inherently be symmetrical, but since the word is describing the clothing of the Piper, it's not all that far-fetched that his clothes would be. I mean, what's more likely for the tale: black and white cloth being sewn into clothing in a symmetrical, eye-pleasing manner, or random bits of coloured cloth being cobbled together? The townfolk probably wouldn't have hired him if he'd come into town looking like a crazy patchworked beggar.

http://www.thefreedictionary.com/pied

Adj. 1. pied - having sections or patches colored differently and usually brightly; "a jester dressed in motley"; "the painted desert"; "a particolored dress"; "a piebald horse"; "pied daisies"