[XeTeX] Coloured fraction bars (vinculum) with unicode math

[Tobias Schoel]

Hi,

simple question: how to colour the fraction bars with unicode math?

I tried, simple as I am: \setmathfont[color=FF0000]{Asana Math}

Minimal Example (using Asana Math) is attached.

Nominator and Denominator are red, but the fraction isn't.


BTW: using the package color and it's commands works, but i wanted to go 
without it.

thx

Toscho

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