Opera palette
Ebony Prairie
From #7b1900 ink through #b13e23, #d05a3f, #d7725a to #f68e75 light, Ebony Prairie is a analogous progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
redoperafive-stophigh-contrast
#7b1900
#b13e23
#d05a3f
#d7725a
#f68e75
The generator opens with #7b1900 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.