Blue Hour palette
Topaz Boulevard
From #003f75 ink through #0066b6, #2d82d4, #4f92d8 to #6aaef7 light, Topaz Boulevard is a tetradic progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
skybluehourfive-stophigh-contrast
#003f75
#0066b6
#2d82d4
#4f92d8
#6aaef7
The generator opens with #003f75 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.