Aurora palette
Umber Cellar
Dark anchor, working middle, light release: #004e57, #007986, #3294a2, #56a2ad, #72beca form a complementary 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
#004e57
#007986
#3294a2
#56a2ad
#72beca
The generator opens with #004e57 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.