Paula shares this link with us describing the find of ancient textiles with the colours that inspire the Pomegranate Guild of Judaic Textiles, Toronto:

http://mfa.gov.il/MFA/IsraelExperience/History/Pages/2,000-year-old-fabrics-dyed-with-murex-snail-extract-31-Dec-2013.aspx. 

Indigo Purple and Crimson

Today, indigo, purple and crimson are also named web colours, identified as 4B0082, 800080, and DC143C – no complicated dyes required!