Opera palette
Mineral Crater
Dark anchor, working middle, light release: #004d80, #2376b6, #4292d4, #61a1da, #7cbef8 form a complementary opera set with somewhere to stand at every lightness. Made for podcast cover art at sixty pixels square. The darkest and lightest stops clear AA for large text.
skyoperafive-stop
#004d80
#2376b6
#4292d4
#61a1da
#7cbef8
The generator opens with #004d80 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.