[XeTeX] \font "<platform font>":color=FFFFFF produces black, not white glyphs \font "<platform font>":color=FFFFFF produces black, not white glyphs, re-visited

[Akira Kakuto]

Dear Philip,

Probably I don't understand the problem.
I'm not a maintainer of xdvipdfmx, but
I have tried to change xdvipdfmx slightly.
Is an attached Demo.pdf a required one?

Thanks,
Akira
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