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%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 11-2-23 on page 737.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

\documentclass{ttctexagray}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.83385pt}
\setlength\parindent{0pt}
\StartShownPreambleCommands
\usepackage{xcolor,multido}
\definecolorseries{testH}{hsb}{last}[hsb]{0,1,1}[hsb]{1,1,1}
\definecolorseries{testS}{cmyk}{last}[hsb]{.1,0,1}[hsb]{.1,1,1}
\definecolorseries{testB}{cmyk}{last}[hsb]{1,1,0}[hsb]{1,1,1}
\resetcolorseries[10]{testH} \resetcolorseries[10]{testS}
\resetcolorseries[10]{testB}
\newcommand\dotest[2]{\makebox[25mm][l]{#1:}
    \multido{\nColr=0+1}{10}{\colorbox{#2!![\nColr]}
            {\color{-#2!![\nColr]}\strut .\nColr}}}
\StopShownPreambleCommands
\begin{document}
\dotest{Hue (H)}{testH}        \\
\dotest{Saturation (S)}{testS} \\
\dotest{Brightness (B)}{testB}
\end{document}