Monochrome palette
Citrus Estuary
From #00535c ink through #007f8b, #349aa7, #59a8b2 to #75c5cf light, Citrus Estuary is a tetradic progression that holds together at any size. Use it for hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA for large text.
cyanmonochromefive-stop
#00535c
#007f8b
#349aa7
#59a8b2
#75c5cf
The generator opens with #00535c as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.