For the cloth, I lifted/adapted a bunch of paint recipes from Eavy-Archive.com and tried my best to match them to a list of medieval dyes. I found the PDF linked from Andy Hobday's excellent "Painting the Past: Uniforms in the High Medieval Period" post on his site, if you wanted to see the original images.

Elderberry (Leaves) & Iron

Tansy (Flowers) & Iron

Tansy (Leaves)

Broom & Iron

Tansy (Young Leaves)

Elderberry (Unripe Berries)

Weld & Iron

Woad & Weld

Gallnuts & Iron

Madder, Iron & Woad

1. Basecoat: Dark Reaper & Skavenblight Dinge 1:1
   Wash Shade: Abbadon Black & Dark Reaper 1:1
   Edge Highlight: Base Mix & Administratum Grey 1:1
   Edge Highlight: Base Mix & Administratum Grey 1:2

Woad (Urine Vat)

1. Basecoat: Dark Reaper & Administratum Grey 1:3
   Recess Shade: Dark Reaper
   Layer Highlight: Base Mix & White Scar 2:1
   Layer Highlight: Base Mix & White Scar 1:1

Woad

Gallnuts

Wallnuts (Green Husks)

Wallnuts (Green Husks)

Wallnuts (Green Husks)

Buckthorn (Bark) & Alkali

Oak (Bark)

Buckthorn (Bark)

Madder & Iron

Madder

Madder, Apples & Alkali

Madder & Copper

Madder (Fermented)

Madder & Apples

Madder, Iron & Woad

Weld

Celandine & Copper

Alder (Pines)

Tansy (Flowers)

Lady's Bedstraw (Flowerrs)

Broom

Gorse

Yarrow

Broom & Alkali

Madder, Iron & Alkali

Madder & Wood

Madder, Apples, Iron & Alkali

Oregano (Flowers), Malt & Apple (Leaves)

Madder & Alkali

Tormentil (Rhizomes) Fermented

Madder & Alkali