Definition of cyanine blue
1 a
: a strong blue that is greener and deeper than Sèvres and redder and darker than cerulean blue (see cerulean blue 1b) — called also
Leitch's blue
b
: a deep purplish blue that is less strong and very slightly redder than sapphire (see sapphire 2a) and bluer and duller than hyacinth blue or Mazarine blue
2
or less commonly
cyanine
: a blue pigment consisting of a mixture of cobalt blue and Prussian blue — called also
Leitch's blue
3
: cyanine 3
