Nature rarer uses Yellow — The Scarlet Letter

Nature rarer uses Yellow 1
Than another Hue.
Saves she all of that for Sunsets
Prodigal of Blue

Spending Scarlet, like a Woman 5
Yellow she affords
Only scantly and selectly
Like a Lover's Words.
(F.1086/J.1045)
[1] Yellow:: yellow in color.
[3] she:: Hester Prynne, who wore a scarlet letter "A" for her illegitimate daughter Pearl; she never revealed the identity of Pearl's father.
[4] Blue:: a depressed, miserable mood.
[5] Scarlet, Woman:: a hint on scarlet woman, an abusive term for the Church of Rome.
[6] Yellow:: the cowardice of Reverend Arthur Dimmesdale, Hester's lover.
[5, 8] Scarlet, Words:: a hint on the Scarlet Letter.

"Nay, we might have judged that such a child's mother must needs be a scarlet woman, and a worthy type of her of Babylon!" ─ The Scarlet Letter by Nathaniel Hawthorne (1851)

Her magnificent abbeys, the work of the Scarlet Woman of Rome, as the Catholic church was opprobriously called by both Puritans and Independents; ─ The Art Journal (September 15, 1840)

(Revelation 17:4–5) And the woman was arrayed in purple and scarlet colour . . . upon her forehead was a name written, MYSTERY, BABYLON THE GREAT, THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH.