Reefless it is not dyed. I have my local LFS hold it for 3 weeks before I picked it up to make sure it did not fade. They are hard to come by but they are out there. I posted a link from the Marine Center. Also, why does everyone always think things are Dyed. I understand it happens and some times we are fooled but for the most part if people know what they are looking for then they know that these do exist...
Here's a picture of my green tree nepthea that I got a few weeks ago. Also, not dyed. Once the purple Cap opens up I will post another picture. It will lighten up quite a bit like the green tree does. when they are closed up they have very vivid colors...