Blue Hour palette
Crimson Cellar
Crimson Cellar runs #004657 through #007089, #308ba5, #5299af to #6eb5cc in five measured steps, the complementary structure keeping every neighbor honest. Reach for it for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
cyanbluehourfive-stophigh-contrast
#004657
#007089
#308ba5
#5299af
#6eb5cc
The generator opens with #004657 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.