Cristmas red i notoriously hard to find, I've tried and only made very small successes.
What I have come up with works for me and my clients. I use the red dye from Angelus and then I start to ad yellow, a little at the time until I'm happy. Almost all red paints and dyes have to much blue in it and the yellow will offset that but beware, you don't want it to get to orange :-).
The only acrylic leather paint I have found that fits the criteria is also by Angelus, their red is just right in my book. This link will take you to the adult section, I made a x-mas paddel using the red acryllic paint...
http://leatherworker.net/forum/index.php?showtopic=44149&st=0