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.
The great sea expeditions of the Viking Age - The basis of the great sea expeditions undertaken by the Vikings was ship technology. The Viking ship was a piece of high technology based upon hundreds of years of development and experience. It was distinguished by its narrow keel and shallow draught. This made even the largest ocean-going warships suitable for sailing onto beaches and up rivers. Such tactics enabled, for example, the siege of Paris to be carried out in the year 885.
The only existing Viking Age helmet was found at a Norwegian burial site in1943, among objects which date back to the 900's. Chain mail, three swords, three axes, three spearheads, riding equipment, game pieces and dice were also found. It is believed that one of the buried men was a petty king from the Ringerike area.