Word: cyan
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...spots on the film that have been exposed to blue light the silver halide grains in the top layer capture and hold all the yellow dye, which lies in the layer just below. Since no red or green light has reached this part of the film, the magenta and cyan dyes in the deeper layers are free to move to the surface. Acting together, they make a spot of blue...
...same molecular machinery produces the other colors. When green light from foliage forms a latent image on the green-sensitive layer, the magenta dye, which is nearest that layer, is captured. The other dyes, yellow and cyan, are free to go to the surface and become the green leaves in the finished picture. Similarly, yellow and magenta make red. Intermediate colors form at places where the images overlap weakly, allowing fractional amounts of dye to escape. White light in the picture (such as a cottony summer cloud) makes exposed spots on all three layers, capturing all the dyes and leaving...