“and they saw the God of Israel. Beneath his feet was what looked like a pavement of sapphire, as blue as the sky.”
(Exodus 24:10 GNT)

The blue of the sky is the most predominant color in the world. The ocean reflects the color of the sky to appear blue. God’s throne is described in the Bible to look like a blue sapphire stone. (Ezekiel 1:26) Every time we look at the blue sky it should remind us that God reigns from on high placing the entire universe beneath His feet. As the blue ocean reflects the color of the sky so the Lord’s “will be done on earth as it is in heaven.” (Matthew 6:10)