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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.
The most commonly used CRT Gamma value 2.2 is used here. To find out the correct gamma of your display device, please check its documents or do an exercise.
