\documentclass{article}

\usepackage[rgb]{xcolor}
\usepackage{xecolor}
\usepackage{pgffor}
\setmainfont{Yas}

\def\testcolor#1{\textxecolor{#1}{xecolor} {\color{#1}{xcolor}}}

\begin{document}
\foreach \x in {red,yellow,green,brown,black,blue,cyan,magenta,lime,pink,purple}
    {\x : \testcolor{\x}\par}
\end{document}