Vowel "colors" and chromoglyhs (Re: Synaesthesia)

A thought just came to me. (That happens occasionally.) A long time ago, I
was toying with the idea of a syllabry, where the shape of each letter
representing the consonant while the *color* of that consonant represents
the associated vowel. I wanted a type of "spectrum" where the front high
(I-type) vowels were at one end and the front back (U-type) vowels were at
the other. Since red is the lowest frequency and purple is the highest,
maybe red could be /i/ and purple /u/. The center of the spectrum, green,
represents /a/. Yellow is /E/, orange /e/, blue-green /O/, blue /o/.

Black would represent either the high central vowels /i-/ or /u-/ (barred
letters), or a consonant without a vowel. Gray could be the schwa /@/. But
how would front rounded vowels or back unrounded vowels be represented?

~Danny~

"What do we do when it's all been said, no new ideas in the house and every
book has been read?" -- Bono

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