This is a collection of links to a question on Facebook.
‘Are there any good resources for Vikings/Norse Gael painting schemes?’
The ones that are collected here are:
A collection of resources on the Studio/Tomahawk forum: http://studiotomahawk.freeforums.org/dark-age-colour-schemes-t180.html, this is for Dark Age in general.
Another general Dark Age colour palette can be found at the 1000 Foot General blog: http://1000footgeneral.blogspot.co.uk/2012/09/dark-ages-color-palettes.html, this is a nice article which links the palette with different commercial model paint colours.
There is a nice painting/colour guide from Crusader Miniatures: http://www.crusaderminiatures.com/guides/FarnworthColoursVikings.pdf, some nice tips and paint recommendations.
Viking Painter has another guide: https://vikingpainter.wordpress.com/2015/03/07/saga-vikings-warlord-hearthguard-paint-guide/: which is more specific to Vikings and Hearthguard, but it isn’t a general palette just a painting guide.
Then there are the Osprey books in the Warrior and Men at Arms series.