Try the following glasurit site:
http://www.glasurit.com/COLOR/new-co...php?language=1
Then search on Alfa, and using some of the hints from previous posts, try a search on model "159", and Start Search.
There are indeed 2 reds shown - Rosso Alfa and a Rosso Rubino Pearl (now, who said that the 8C colour looked ruby-like)?
Hope this helps.