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.
Disc Brooches from Viking York. The prime function of these brooches was as dress fastenings. They were frequently made of base metals, as is the case with all those shown here, but they were often highly decorated.