4 occurrences in 4 dictionaries
Reference: Blue
American
See PURPLE.
Easton
generally associated with purple (Ex 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 (Ex 28:31), also the loops of the curtains (Ex 26:4) and the ribbon of the breastplate (Ex 28:28). Blue cloths were also made for various sacred purposes (Nu 4:6-7,9,11-12). (See Colour.)
See Verses Found in Dictionary
Hastings
Morish
This colour was used extensively in the hangings of the tabernacle; in the vesture of the priests; and in the coverings of the vessels of the tabernacle when they were being removed. The colour is typical of heaven: the whole of the tabernacle was "a shadow of heavenly things." Ex 26:28: etc.