It's a nice thought, but describing the color in the OP as emerald seems like it would be a fairly poor attempt at describing your vision. It's more of a cornflower blue, or even as you say (and something easily accessible to the ancients): the color of a clear summer sky.
For example if I was John and I saw the color of infinite temperature around God's throne, I would probably say something more like:
> and there emanated from the throne an incredibly bright blue halo, as if a clear summer sky was shooting forth from God's throne.
For example if I was John and I saw the color of infinite temperature around God's throne, I would probably say something more like:
> and there emanated from the throne an incredibly bright blue halo, as if a clear summer sky was shooting forth from God's throne.