Opera palette
Umber Harbor
From #00486e ink through #0071a9, #308cc6, #539bcd to #70b8eb light, Umber Harbor is a monochromatic progression that holds together at any size. Use it for dashboards where status colors must survive color-vision differences. The darkest and lightest stops clear AA as a text pair.
skyoperafive-stophigh-contrast
#00486e
#0071a9
#308cc6
#539bcd
#70b8eb
The generator opens with #00486e as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.