%!TEX pdflatex

\documentclass[12pt]{article}
\usepackage{tikz}

\begin{document}

\begin{tikzpicture}
	\begin{scope}
		\clip (0,0) circle (1.5) ;
		\draw (-1.5,0.75) -- (1.5,0.75) ;
		\draw (-1.5,-0.75) -- (1.5,-0.75) ;
		\draw (-1.5,0) -- (1.5,0) ;
		\draw[fill=red!50] (-1.5,0.75) rectangle (1.5,0) ;
		\draw[fill=blue!50] (-1.5,-0.75) rectangle (1.5,0) ;
	\end{scope}
	\draw (0,0) circle (1.5) ;
\end{tikzpicture}

\end{document}