The Color of a Queen, is this ―

The Color of a Queen, is this ―
The Color of a Sun
At setting ― this and Amber ―
Beryl ― and this, at Noon ―

And when at night ― Auroran widths
Fling suddenly on men ―
‘Tis this ― and Witchcraft ― nature keeps
A Rank ― for Iodine ―

There is a Rank from natural Purple (Queen) to synthetic Iodine (witchcraft).

This is the Color of a Queen ―
The color of a Sun setting ―
Further Amber ―
And Beryl ― the color at Noon―

And at Dawn Auroran curtains
Widely spread on men ―
And Witchcraft―nature keeps
A Rank for Iodine.