Four Elements An Earth, Air, Fire and Water design with weld, woad and madder This greeting card is made with several types of silks dyed with plants: green is for Earth (weld over-dyed with woad), yellow is for Air (weld leaves), red is for Fire (madder roots) and blue is Water (woad). All the colours in the card were in use in celtic and medieval times. Price £2.95 Click on Buy button below card to buy