I read that the bright colours on the tartan which were attributed to local plant dyes were actually imported. It has been scientifically proven that red was from cochineal from the Americas and the bright blue is indigo imported from India. The connections between India and Scotland fascinate me.
Here I cheekily post a sari advert from a famous silk house in South India.It is a modern version of a very old silk print that has been woven for hundreds of years. But I see a tartan pattern in it. My grandmother had similar silk saris. Of course tartan and bagpipes were also made in Punjab for the British Army. From Paisley near Glasgow that had mills reproducing the beautiful pattern that originated in India to the tartan dyes, the links between the two countries weaves a wonderful pattern in my mind.