Isn't it possible that both light and temperature play an important part in color? For example, in the spotted Phals with Golden Peoker, Super Stupid et.al. in their background, it has been fairly well documented that the size, number and intensity of the spots are pretty well controlled by the temperature.
Likewise, light intensity is known to affect the production of many pigments.
Also, exposure to light as the flowers are opening quite dramatic. Once had a C. maxima that I took to work and placed in a fairly dark lobby. About half of the blooms were open when I took it in and were normal in color while the ones never exposed to light after opening were still white weeks later!
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Jerry
""Many a scientific investigation has been lost for years if not forever in the jungle of journals and the tangle of tongues. Unknown"
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