Opera palette
Inked Foundry
Dark anchor, working middle, light release: #00436a, #006ba5, #2f86c2, #5095c9, #6cb1e6 form a tetradic opera set with somewhere to stand at every lightness. Made for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
skyoperafive-stophigh-contrast
#00436a
#006ba5
#2f86c2
#5095c9
#6cb1e6
The generator opens with #00436a as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.