Blue Hour palette
Ebony Delta
From #004873 ink through #2870a5, #458bc2, #619ac9 to #7cb6e7 light, Ebony Delta is a split-complementary progression that holds together at any size. Use it for hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA for large text.
skybluehourfive-stop
#004873
#2870a5
#458bc2
#619ac9
#7cb6e7
The generator opens with #004873 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.