Blue Hour palette
Halcyon Estuary
From #a21e00 ink through #d25037, #f26d53, #f8866e to #ffb1a0 light, Halcyon Estuary is a tetradic progression that holds together at any size. Use it for wellness apps where the interface must feel calm, not clinical. The darkest and lightest stops clear AA for large text.
redbluehourfive-stop
#a21e00
#d25037
#f26d53
#f8866e
#ffb1a0
The generator opens with #a21e00 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.