Aurora palette
Umber Foundry
Dark anchor, working middle, light release: #004d53, #007881, #32939c, #55a1a8, #72bdc5 form a monochromatic aurora set with somewhere to stand at every lightness. Made for book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
cyanaurorafive-stop
#004d53
#007881
#32939c
#55a1a8
#72bdc5
The generator opens with #004d53 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.