Opera palette
Calico Bookshop
Dark anchor, working middle, light release: #004574, #1f6daa, #3e88c7, #5b97ce, #77b4ec form a tetradic opera set with somewhere to stand at every lightness. Made for outdoor gear branding that reads in sun and shade. The darkest and lightest stops clear AA as a text pair.
skyoperafive-stophigh-contrast
#004574
#1f6daa
#3e88c7
#5b97ce
#77b4ec
The generator opens with #004574 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.