Yes. It's the short-wavelength receptors that are missing from the fovea. Informally, they are blue receptors, but the ranges overlap in a much more complicated

Yes. It's the short-wavelength receptors that are missing from the fovea. Informally, they are blue receptors, but the ranges overlap in a much more complicated way. Terrible color combinations for text: blue/black, magenta/red, cyan/green, white/yellow. The example uses blue/black.