I'm new here so am just seeing your Clematis Forum. I have a Nelly Moser which I love and a purple one but the only name I can find for it is Jackal. It gets huge, so much so I had to buy a 6' trellis and still it hangs over the top of the plant. Perhaps someone can give me the correct name of it.
Mine is kind of on the faded side but I add lime each year to the soil and the colors get deeper and brighter.