Confusion Lines
Confusion lines are the lines in a color space on which the colors cannot be
discriminated by the corresponding dichromat (a person missing one photo-pigment).
The red, green and blue dots and the confusion lines originated from them are
that of protanope (missing long wavelength cone), deuteranope (missing middle
wavelength cone) and tritanope (missing short wavelength cone) respectively.
The
Limited Edition page
shows the confusion lines that can be displayed by a standard monitor's RGB
phosphors. The
Click-Draw
page allows you manually draw confusion
lines that end at any points in the chromaticity diagram.
Click the chart to redraw it if it is
distorted
Click the chart to redraw it if it is
distorted
Click the chart to redraw it if it is
distorted
Here the copunctal points derived by Smith
and Pokorny (1975) are used because they are probably the only set of
copunctal points for 1931 CIE color matching functions. The spacing of the
confusion lines are arbitrary. Please see Stockman,
A., Sharpe, L.T. (1999) for a thorough review of cone primaries. Colblindor
has a
very readable blog explaining copunctal points and confusion lines.