Aurora palette
Obsidian Orchard
From #2e31a9 ink through #5060d3, #687cf2, #7b8ff4 to #9cafff light, Obsidian Orchard is a analogous progression that holds together at any size. Use it for event posters that compete with a wall of other posters. The darkest and lightest stops clear AA as a text pair.
blueaurorafive-stophigh-contrast
#2e31a9
#5060d3
#687cf2
#7b8ff4
#9cafff
The generator opens with #2e31a9 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.