Numbers 4:13
They are also to remove the ashes on the altar and spread a purple cloth over it.
Exodus 27:1-8
"You are to make the altar of acacia wood. It is to be five cubits long and five cubits wide; the altar is to be a square, and it is to be three cubits high.
Exodus 39:1
From the blue, purple, and scarlet material they made finely woven garments for ministering in the Holy Place, and they made the holy garments for Aaron, just as the LORD commanded Moses.
Exodus 39:41
the woven garments for Aaron the priest for ministering in the Holy Place, and the garments for his sons for serving as priests.
Leviticus 6:12-13
The fire on the altar is to be kept burning continuously without being extinguished. The priest is to burn wood on it every morning, arrange burnt offerings over it, and then burn the fat contained in the peace offerings over it.
Numbers 4:6-9
They are to set a leather-dyed skin covering over it, cover it with a pure blue cloth, and then insert its poles.
Numbers 4:11-12
"On the golden altar, they are to spread a blue cloth, cover it with a leather-dyed skin covering, and then insert its poles.