Colour vision, a discussion of the leading phenomena and their physical laws (1922)
Peddie, William · London, Arnold · leaf 76
ch may lead to anexternal position of a corner of a derived triangle relatively tothe absolute triangle, lies altogether apart. The possible cases occur under four classes. The first,already discussed, is that with the three derived corners insidethe absolute triangle ; in the second two corners… … Fig. 5.—Derived Colour Triangles. Class II. to the triangle into two sets of three regions, and the cornersof the new triangle may be variously positioned therein. Alsothe order in which the fundamental perceptions occur relativelyto the spectrum colours may, as we have seen, be inverted. Fig. 5…
Color
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