My particular colourblindness is quite difficult to characterise properly.
I was first diagnosed as an extreme Deutanome, but more detailed tests showed I was between that and cone monochromatic.
The specific problem, as far as they could ascertain, is that I have far to many S cones (short wavelength, ie blue) and a much reduced number of L or M cones.
My eyes are hypersensetive to some shades of blue, particularly that neon blue colour that way too many people are now fronting their take outs with :-D
It's like looking at burning magnesium *squint*