%%
%% The LaTeX Companion, 3ed
%%
%% Example 6-6-1 on page I-468 in "Colored table 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{87.0pt}
%StartShownPreambleCommands
\usepackage{colortbl,hhline} \setlength\arrayrulewidth{1pt}
\newcolumntype{B}{!{\color{blue}\vline}}
\newcommand\blueline{\arrayrulecolor{blue}\hline\arrayrulecolor{black}}
\newcommand\bluecline[1]{\arrayrulecolor{blue}\cline{#1}%
                                              \arrayrulecolor{black}}
%StopShownPreambleCommands

\begin{document}
\begin{tabular}{cBc|c}       \hline
   A  & B  & C  \\ \cline{1-1}\bluecline{2-3}
   X  & Y  & Z  \\ \blueline
  100 & 10 & 1  \\ \hhline{= >{\arrayrulecolor{blue}}:=
                             >{\doublerulesepcolor{yellow}}=}
\end{tabular}
\end{document}