I was testing out the new snapshot (for a YouTube video) and I killed a squid using my fist on Creative. It dropped two Ink Sacs, which I picked up. I noticed that the Ink Sacs' tooltip in the Statistics menu showed as "item.dyePowder.name", which is the code name (I think). I don't know if other dyes are like this, I tried grabbing some of the new flowers from the Creative menu and using a Crafting Table to turn them into dye but they didn't show up under Statistics, I don't know if this is intentional or not.