"A Tunisian man has pieced together bits of a local secret linked to ancient emperors: how to make a prized purple dye using the guts of a sea snail."
https://archaeologynewsnetwork.blogspot.com/2020/07/passion-for-purple-revives-ancient-dye.html
Interesting to see the range of colours he produced.
Clever lad. I hope it makes him rich. The colours look great.