Aurora palette
Copper Library
Copper Library runs #004559 through #006f8c, #308aa8, #5298b2 to #6eb4ce in five measured steps, the split-complementary structure keeping every neighbor honest. Reach for it for music artwork with loud darks and a glowing accent. The darkest and lightest stops clear AA as a text pair.
cyanaurorafive-stophigh-contrast
#004559
#006f8c
#308aa8
#5298b2
#6eb4ce
The generator opens with #004559 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.