A Viking Age colour palette + bit of info on the dyes. And here's a text only page with a great list of dyes definitely and probably used: www.cs.vassar.edu... And some local colour variations, eg purple in Ireland.
Viking Age molds for making silver pendants--Crucifixes & Mjolnir (Thor's Hammer). The far right mold could be used for making either depending on the customer. Mjolnir pendants only became popular to compete with the crosses worn by those with the new religion at the spread of Christianity.