\documentclass{article}
\usepackage[cmyk]{xcolor}

\usepackage{tikz}
\usetikzlibrary{fadings}

\usepackage{xepersian}
\settextfont{Yas}

\begin{document}

\begin{bidi@tikzpicture}[remember picture,overlay]
%    \shade [top color=yellow,bottom color=red!50] (current page.north west) rectangle (current page.south east);%
    \fill [green] {(current page.south east) rectangle (current page.north west)};%
	\draw (current page.north west)+(-2em,2em) node[anchor=north west,opacity=.3]
	{\includegraphics[width=1.1\textwidth]{logo}};
\end{bidi@tikzpicture}

\centerline{\Huge Hi Parsi\LaTeX{}}

\end{document}