Here is a good article on some recent finds that shed light on the colors used in clothing circa 900 BC in Israel. Seems to be a wider variety than perhaps I suspected, and apparently available not only to royalty but also to skilled craftsmen. Color pictures included.
http://www.timesofisrael.com/what-color-blue-did-king-solomon-wear-new-evidence-tells-us/?utm_source=The+Times+of+Israel+Daily+Edition&utm_campaign=a74177e1d3-EMAIL_CAMPAIGN_2017_06_29&utm_medium=email&utm_term=0_adb46cec92-a74177e1d3-55476929