% Fichier ex12.2.1-1.tex - Ch. Rolland/O Reilly France
\documentclass{article}
\usepackage[latin1]{inputenc}
\usepackage[dvips]{color}
\begin{document}
{\color{red}Une 
\textcolor{blue}{petite}
phrase}
\textcolor{white}{invisible}
\end{document}
