Tweedy has made a career out of sifting the wreckage of destructive relationships ("I thought it was cuteFor you to kissMy purple-black eyeEven though I caught it from you .
Porgy, a purple-black beggar with crippled legs and a pungent goat, croons to his scampering dice, prays with his neighbors in Catfish Row, contemplates the insignificance of man.
There are hundreds of varieties, ranging from purple-black to almost white.