Jewel palette
Lupine Boulevard
Lupine Boulevard runs #00437c through #186ab7, #3986d5, #5796da to #73b2f8 in five measured steps, the tetradic 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.
skyjewelfive-stophigh-contrast
#00437c
#186ab7
#3986d5
#5796da
#73b2f8
The generator opens with #00437c as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.