Dyed, no. Dyed anemones have a uniform unnatural coloration (i.e. yellow sebaes). It is impossible to dye just one portion like only the tips of the tentacles.
Photographically enhanced... ?
I have seen anemones with that coloration before, but NEVER as vibrant as what they are showing on the site. Doesn't mean they don't exist - but I have never seen it. They look super healthy, regardless - nicely burrowed into the substrate and really dark zooxanthellae.