[Tex/LaTex] Cell colour overlapping cell borders

colorrulestables

This code makes the borders disappear in the coloured cells. How do I get the borders back? Have tried hhline and this doesn't work. 

\documentclass{article}
\usepackage[table]{xcolor}
\usepackage{graphicx}
\begin{document}
\begin{table}
\resizebox{\textwidth}{!}{%
\begin{tabular}{lll}
\multicolumn{1}{c}{\textbf{Table}} & \multicolumn{1}{c}{\textbf{}}                              &                       \\
                               & a                                                          & b                     \\ \cline{2-3} 
\multicolumn{1}{l|}{a}             & \multicolumn{1}{l|}{\cellcolor[HTML]     {FE0000}\textit{}} & \multicolumn{1}{l|}{} \\ \hline
\multicolumn{1}{|l|}{\textit{b}}   & \multicolumn{1}{l|}{\cellcolor[HTML]        {CD9934}}          & \multicolumn{1}{l|}{} \\ \hline
\end{tabular}%
}
\caption{My caption}
\label{my-label}
\end{table}
\end{document}

Best Answer

Thuis is known issue with \cline{...} and colortbl. In such situations lines from package hhline is handy:

\documentclass{article}
\usepackage[table]{xcolor}
\usepackage{graphicx}
\usepackage{hhline}
\newcommand\mc[1]{\multicolumn{1}{c}{#1}}

\begin{document}
\begin{table}
\resizebox{\textwidth}{!}{%
\begin{tabular}{r|c|c|}
\mc{\textbf{Table}}     & \mc{}                     & \mc{}     \\
\mc{}                   & \mc{a}                    & \mc{b}    \\ 
    \hhline{~|-|-|}
\textit{a}              & \cellcolor[HTML]{FE0000}  &           \\ 
    \hhline{~|-|-|}
\textit{b}              & \cellcolor[HTML]{CD9934}  &            \\ 
    \hhline{~|-|-|}
\end{tabular}%
}

or 

\resizebox{\textwidth}{!}{%
\begin{tabular}{|r|c|c|}
\mc{\textbf{Table}}     & \mc{}                     & \mc{}     \\
\mc{}                   & \mc{a}                    & \mc{b}    \\
    \hhline{-|-|-|}
\textit{a}              & \cellcolor[HTML]{FE0000}  &           \\
    \hhline{-|-|-|}
\textit{b}              & \cellcolor[HTML]{CD9934}  &            \\
    \hhline{-|-|-|}
\end{tabular}%
}
\caption{My caption}
\label{my-label}
\end{table}
\end{document}

enter image description here

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