'The Lord's throne' signifies, in general, the whole heaven, and specifically, the spiritual heaven, and by extension, divine truth proceeding, and so, everything of heaven and the church.

In Genesis 41:40, this signifies things that are natural. (Arcana Coelestia 5313)

In Exodus 11:5, this signifies the falsified truths of faith that have wrongly receive attention. (Arcana Coelestia 7779)

'The throne built by Solomon,' as mentioned in 1 Kings 10:18-20, signifies both royalty and judgment.

In Isaiah 66:1, this signifies celestial and spiritual things which when they relate to the Divine are like natural things to man's spiritual and celestial. (Arcana Coelestia 2162[8])

In Matthew 25:31, this signifies judgment. (Arcana Coelestia 4809[3])

In Revelation 1:4, this signifies the universal heaven. 'Throne' signifies heaven and judgment.

'Throne,' as in Revelation 4:2, signifies a representation of judgment, because the things which John saw were representative visions. He saw them as he described them, but they were forms representative of things to come.

In Revelation 8:2, this signifies the church regarding doctrine.

'Throne,' as in Revelation 12:5, signifies the angelic heaven.

'Throne' also signifies the government of falsity and evil in Revelation 2:13, 8:2, Daniel 7:9, Haggai 2:22, and Isaiah 14:13.

(References: Apocalypse Explained 8 [2], 289)

1624. The form of one of the large rainbows was shown to me, so that from it I could get to know what their smallest forms were like. It was a pure white light with a kind of border, in the middle of which was a dark object as if made of earth. This was surrounded by an extremely luminous halo, itself variegated and divided up by another luminescence that had yellow dots like tiny stars. Additional variegations were produced by flowers of different colours entering the luminous area. The colours of these flowers emanated not from a white light but from a flame-like one. All of these appearances were representative of celestial and spiritual things. All the colours that are seen in the next life represent that which is celestial or spiritual. The colours emanating from the flame-like light represent things that belong to love and the affection for good, whereas colours emanating from the white light represent those that belong to faith and the affection for truth. These are the sources of all colours in the next life, and they are therefore so resplendent that the colours of this world cannot compare with them. Colours also exist there which are never seen in this world.