\documentclass{report}
\usepackage{xcolor} 
\usepackage{xepersian}
\settextfont[Scale=2.5]{XB Zar}

\begin{document}

\begin{center}
\textcolor{red}{ب}\textcolor{green}{ه}
\
\textcolor{cyan}{ع}
\textcolor{blue!80}{ن}
\textcolor{brown}{و}
\textcolor{yellow}{ا}
\textcolor{blue!80}{ن}
\
\textcolor{purple}{م}
\textcolor{blue}{ث}
\textcolor{yellow}{ا}
\textcolor{green!50}{ل}
\\[.5cm]
\textcolor{purple}{م}
\textcolor{blue!60}{ه}
\textcolor{magenta!50}{د}
\textcolor{cyan!50}{ی}
\
\textcolor{blue!60}{ه}
\textcolor{yellow}{ا}
\textcolor{orange}{ش}
\textcolor{purple}{م}
\textcolor{cyan!50}{ی}
\end{center}

\end{document}