[XeTeX] Arabic text and color

[Anas Ghrab]

Hi all,

Why I could not get the color on the wright text in the example below ?

Thank you for your help.

---
Anas Ghrab




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\documentclass{article}

\usepackage{fontspec}
\usepackage{xunicode}
\usepackage[fullvoc,fdf2noalif]{arabxetex}
\newfontinstance\arabicfont[Script=Arabic,Scale=1.2,WordSpace=2]{XW Zar}

\usepackage[usenames]{color}

\newcommand{\green}[1]{
{\color{green}{#1}}
}

\begin{document}

\LARGE

\begin{arab}

اعْلَمْ‏ ‬بِأَنَّ
\green{الرّاست}
  ‬أَصْلٌ‏ ‬مُسْتَقِلْ

\end{arab}

\end{document}