[Tex/LaTex] Table cell color overlaps cell border

colortables

As the graphic and MWE below show, some of colored my table cells are obscured the cell colors. I'd appreciate help fixing this.

Table with colored cells

\documentclass[english]{article}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}
\usepackage[table]{xcolor}

\makeatletter
\providecommand{\tabularnewline}{\\}
\makeatother

\usepackage{babel}
\begin{document}
\begin{tabular}{c|c|c|c|cc|}
\multicolumn{1}{c}{} & \multicolumn{1}{c}{A} & \multicolumn{1}{c}{B} & \multicolumn{1}{c}{C} & D & \multicolumn{1}{c}{E}\tabularnewline
\cline{2-6} 
a & \cellcolor{blue!25} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} &  & \cellcolor{red!25} \tabularnewline
\cline{2-3} 
b &  &  & \multicolumn{1}{c}{} &  & \tabularnewline
\cline{2-4} 
c &  &  &  &  & \tabularnewline
\cline{2-5} 
d &  &  &  & \multicolumn{1}{c|}{} & \tabularnewline
\cline{2-6} 
e &  & \cellcolor{green!25} &  & \multicolumn{1}{c|}{} & \tabularnewline
\cline{2-6} 
\end{tabular}
\end{document}

Best Answer

You can use hhline here which simply adds vertical space and doesn’t get over-drawn by \cellcolor.

Code

\documentclass{standalone}
\usepackage[table]{xcolor}
\usepackage{hhline}
\begin{document}
\begin{tabular}{c|c|c|c|cc|}
    \multicolumn{1}{c}{} & \multicolumn{1}{c}{A} & \multicolumn{1}{c}{B} & \multicolumn{1}{c}{C} &           D           & \multicolumn{1}{c}{E} \tabularnewline \hhline{~|*{5}{-}}
             a           &  \cellcolor{blue!25}  & \multicolumn{1}{c}{}  & \multicolumn{1}{c}{}  &                       &  \cellcolor{red!25}   \tabularnewline \cline{2-3}
             b           &                       &                       & \multicolumn{1}{c}{}  &                       &  \tabularnewline \cline{2-4}
             c           &                       &                       &                       &                       &  \tabularnewline \cline{2-5}
             d           &                       &                       &                       & \multicolumn{1}{c|}{} &  \tabularnewline \hhline{~|*5-}
             e           &                       & \cellcolor{green!25}  &                       & \multicolumn{1}{c|}{} &  \tabularnewline \hhline{~|*5-}
\end{tabular}
\end{document}

Output

enter image description here

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