An original orange dye of Fig. 9.16 in large concentration can become blue. Middle region gets wiped out first, so looks red, then red gets wiped out, leaving only blue. CIE curve shows the color path. Trans. of Fig.
Yellow food coloring in concentration is red.
Yellow food coloring. At each reflection, some of the light is absorbed Trans. of Fig. 9.7 Dependence of subtractive color on the light source Lamps of various types can cause one to lose color. If a lamp emits only spectral yellow, then red, green, blue may not show at all if they are spectral also. Method for knowing is to take the intensity distribution curve of the source and multiply it by the reflectance curve of the object.