Why some Valhalla IC are blue some are red

I saw some posts in Audiogon selling Nordost Valhalla IC, some cables look like red colour, some are blue. Which ones are the true colour ? or they are different versions


Valhalla digital cables appear to be blue, but the analogue cables should be red. Check out the Nordost web site. http://www.nordost.com/brandshow.asp?BrandCatID=2