Nebula palette
Marble Plaza
Marble Plaza runs #3f3376 through #645b9f, #7e75bc, #8d87c3 to #a8a2e1 in five measured steps, the analogous 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.
bluenebulafive-stophigh-contrast
#3f3376
#645b9f
#7e75bc
#8d87c3
#a8a2e1
The generator opens with #3f3376 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.