E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Green cloth for foresters; so called from Kendal, Westmoreland, famous at one time for this manufacture. Kendal green was the livery of Robin Hood and his followers. In Rymers Fdera (ii. 83) is a letter of protection, dated 1331, and granted by Edward III. to John Kempe of Flanders, who established cloth-weaving in the borough. Lincoln was also famous at one time for dyeing green.
How couldst thou know these men in Kendal green, when it was so dark thou couldst not see thy hand?Shakespeare: 1 Henry IV., ii. 4.