Acid palette
Opal Bookshop
Dark anchor, working middle, light release: #005e76, #008aac, #37a6c9, #5eb4d2, #7cd1f0 form a tetradic acid set with somewhere to stand at every lightness. Made for bike-shop liveries that survive mud and sun. The darkest and lightest stops clear AA for large text.
cyanacidfive-stop
#005e76
#008aac
#37a6c9
#5eb4d2
#7cd1f0
The generator opens with #005e76 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.