Nebula palette
Iris Cove
Dark anchor, working middle, light release: #136699, #4a90c3, #66ace1, #81bbe8, #a6d8ff form a triadic nebula set with somewhere to stand at every lightness. Made for book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
skynebulafive-stop
#136699
#4a90c3
#66ace1
#81bbe8
#a6d8ff
The generator opens with #136699 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.