Q.Is Reddy/brown New Growth Leaves Normal?
Clematis Armandii planted approx 4 weeks ago in a large terracotta pot using Ericaceous planting and potting mix. Keeping it watered. New growth has happened for the first time this week, the leaves appear healthy but they’re red/brown in colour, is this normal? Any help would be greatly appreciated. Thanks! (Please see pics of before new leaves and after)

Certified GKH Gardening Expert
Yes, this can be normal. I don't see anything out of the ordinary. Just be sure that you care for it properly to ensure that it grows normally, and changes to the mature green color.
Here are some articles that will help: