Numbers 4:7, 9

Over the table of the bread of the Presence they shall also spread a cloth of violet and put on it the dishes, the pans, the sacrificial bowls, and the jugs for the drink offering; and the continual bread shall be on it.

Then they shall take a violet cloth and cover the lampstand for the light, along with its lamps, its tongs, its trays, and all its oil containers, by which they attend to it