Well, it did not have purple colour, but gray when uncooked.
When I cooked it, the water turned dark blue and pasta turned green color.
This pasta has just a hint of the kale taste, but I think that it should be healthier than plain with wheat flour and eggs.
I put a small piece of the uncooked pasta in vinegar and it got pink. Next time I may try this with an acidic sauce or I just make the pasta with green kale.
I am now planning also to try color homemade pasta with beets or carrots. Stay tuned for future experiments.

Sari