John saw is a central place of God's administration and government over the entire universe.
The One sitting on the throne is God the Father. The color of this One is JASPER and SARDIUS.
I only have a desire to mention something about JASPER-
"And He who sits upon the throne was like a jasper stone and a sardius in appearance."
I believe the jasper
here is the deep dark GREEN kind. Jasper comes in other colors.
The deep dark GREEN God signifies God as the rich, eternal LIFE. What does God look like ? God looks like the riches of life. God appears as the fullness of life.
The trees, the grass, the plants are mostly green. Green stands for life. Jasper stands for the deepest and riches life - the Divine and Uncreated life of the Self Existent God. He is the Eternal Father
God appears in the sign as the richness of life.
His life is rich to the point of being glorious and dazzling.
When we examine Jesus Christ, in a sense, we also see the richness of life.
Surely Jesus Christ's life was the deepest, fullest, riches expression of living.
The Father on the throne is the very Source of life.
All lives derive from Him. And He is the Uncreated and eternal Source of all living.
The sardus stone is a red stone. And this probably stands for God the redemption of creation and man which has its source in God. Red is also the color of blood for redemption of sinners out from under the Law of God.
But more about Jasper below.