Yep, I've seen 'em. Nope, I'm not buying any of them.
The colors are totally unrelated to any character they have on the label.
NONE of the yarns have the only two real knitters in the entire seven books - Hermione or Molly.
Opal obviously did little or no research into this. They got permission to use the HP names, dumped a bunch of colors into the yarns (and yes, Opal makes very nice sock yarns) and then, I dunno, dumped names into a hat & pulled 'em out? Something like that, I'd guess!
For example .... Draco is on one of the colorways. What colors are in it? Well ..... it'd be perfect for Ravenclaw!
Draco, tho, is Slytherin. And there's not a hint of green to be seen in the colorway.