%%
%% The LaTeX Companion, 3ed
%%
%% Example 6-6-4 on page I-469 in "\protect \nxLPack {arydshln} --- Dashed rules".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{111.0pt}
%StartShownPreambleCommands
\usepackage{colortbl,arydshln}   \renewcommand\arraystretch{1.5}
\setlength\dashlinedash{10pt}   \setlength\dashlinegap{5pt}
\setlength\arrayrulewidth{1pt}  \arrayrulecolor{blue}
%StopShownPreambleCommands

\begin{document}
\begin{tabular}{;{5pt/2pt}c::c:c;{2pt/2pt}}
\hdashline
 A    & B  & C  \\ \hdashline
 X    & Y  & Z  \\ \hdashline[5pt/2pt]
1000  & 10 & 1  \\ \hdashline \hdashline[5pt/5pt]
\end{tabular}
\end{document}