It is a grotesque misapprehension which sees in art no more than a craft comprehensible perfectly only to the craftsman: art is a manifestation of emotion, and emotion speaks a language that all may understand.
Hammered silver is brought from Tarshish and gold from Uphaz. What the craftsman and goldsmith have made is then dressed in blue and purple— all made by skilled workers.
All those who were skilled among the workers made the tabernacle with ten curtains of finely twisted linen and blue, purple and scarlet yarn, with cherubim woven into them by expert hands.
They fashioned the breastpiece—the work of a skilled craftsman. They made it like the ephod: of gold, and of blue, purple and scarlet yarn, and of finely twisted linen.