Acid palette
Lotus Boulevard
Dark anchor, working middle, light release: #004a48, #007673, #31918e, #549e9b, #70bbb7 form a tetradic acid set with somewhere to stand at every lightness. Made for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
cyanacidfive-stophigh-contrast
#004a48
#007673
#31918e
#549e9b
#70bbb7
The generator opens with #004a48 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.