Bible Dictionaries
Blue

Easton's Bible Dictionary

Generally associated with purple (Exodus 25:4; 26:1,31,36 , etc.). It is supposed to have been obtained from a shellfish of the Mediterranean, the Helix ianthina of Linnaeus. The robe of the high priest's ephod was to be all of this colour (Exodus 28:31 ), also the loops of the curtains (26:4) and the ribbon of the breastplate (28:28). Blue cloths were also made for various sacred purposes (Numbers 4:6,7,9,11,12 ). (See COLOUR .)

Bibliography Information
Easton, Matthew George. Entry for 'Blue'. Easton's Bible Dictionary. https://www.studylight.org/​dictionaries/​eng/​ebd/​b/blue.html. 1897.