[Tex/LaTex] \hhline not working with \multirow and \cellcolor

Question

I am trying to make a table with colored cells and white grid lines, in it there are some cells that cover several rows. The problem is that when I use \multirow and \cellcolor to achieve this, the horizontal line in the \multirow cel is still appearing. This is what I am getting:

And here is my code:

\documentclass{article}
\usepackage[a4paper,margin=1in]{geometry}
\usepackage[svgnames]{xcolor}
\usepackage{tabularx,multirow,hhline,colortbl}
\usepackage{hhline}

\definecolor{headers}{RGB}{0,137,182}
\definecolor{M1}{RGB}{163,195,217}
\definecolor{M2}{RGB}{155,214,220}


\begin{document}
    \setlength\arrayrulewidth{1pt}
    \newcolumntype{L}{>{\raggedright\arraybackslash}X}
    \begin{tabularx}{\textwidth}{>{\raggedright\arraybackslash}m{0.25\textwidth} !{\color{white}\vrule width 1pt} L !{\color{white}\vrule width 1pt} >{\raggedright\arraybackslash}p{0.25\textwidth}l}
        \rowcolor{headers}
        \centering\textbf{\textcolor{white}{Ministries}} & \centering\textbf{\textcolor{white}{National Agencies}} & \textbf{\textcolor{white}{Regional Agencies}}\\
        \arrayrulecolor{white}\hline
        \rowcolor{M1}
        Ministry of the Interior&&Regional Council of Souss-Massa\\
        \arrayrulecolor{white}\hline
        \cellcolor{M2}&\cellcolor{M2}National Office for Electricity and Drinking Water (ONEE)&\cellcolor{M2}\\
        \hhline{~--}
        \cellcolor{M2}&\cellcolor{M2}&\cellcolor{M2}&\\
        \hhline{~--}
        \cellcolor{M2}&\cellcolor{M2}&\cellcolor{M2}&\\
        \hhline{~--}
        \cellcolor{M2}&\cellcolor{M2}&\cellcolor{M2}&\\
        \hhline{~--}
        \cellcolor{M2}&\cellcolor{M2}&\cellcolor{M2}&\\
        \hhline{~--}
        \multirow{-6}{0.25\textwidth}{\cellcolor{M2}Ministry of Energy, Mines, and Sustainable Development}&\cellcolor{M2}&\cellcolor{M2}&\\
    \end{tabularx}
\end{document}

Thank you for any guidance!

Answer 1

lie this?

what you see as rules in your table are actually gaps between cells with size of rules thicknes. they appear as rules since you have all rules in white color ...

this gaps can be colored with part of rule in multirow cell:

\documentclass{article}
\usepackage[a4paper,margin=1in]{geometry}
\usepackage[svgnames,table]{xcolor}
\usepackage{makecell, multirow, tabularx}
    \newcolumntype{L}{>{\raggedright\arraybackslash}X}
    \renewcommand\theadfont{\normalsize\bfseries\color{white}}
\usepackage{hhline}

\definecolor{headers}{RGB}{0,137,182}
\definecolor{M1}{RGB}{163,195,217}
\definecolor{M2}{RGB}{155,214,220}


\begin{document}
    \setlength\arrayrulewidth{2pt}
    \arrayrulecolor{white}
    \def\clinecolor{\hhline{|>{\arrayrulecolor{M2}}-%
             >{\arrayrulecolor{white}}|-|-|}}
    \begin{tabularx}{\textwidth}%
    {|
    >{\hsize=0.5\hsize\columncolor{M2}}L
     |
    >{\columncolor{M2}}L
     |
    >{\hsize=0.5\hsize\columncolor{M2}}L
     |
    }
    \rowcolor{headers}
\thead{Ministries}          & \thead{National Agencies} & \thead{Regional Agencies}         \\
    \hhline{|-|-|-|}
    \rowcolor{M1}
Ministry of the Interior    &                           & Regional Council of Souss-Massa   \\
    \hhline{|-|-|-|}
                            & National Office for Electricity and Drinking Water (ONEE)
                                                        &                                   \\
    \clinecolor
                            &                           &                                   \\
    \clinecolor
                            &                           &                                   \\
    \clinecolor
                            &                           &                                   \\
    \clinecolor                                &                           &                                   \\
    \clinecolor
\multirow{-7}{=}{Ministry of Energy, Mines, and Sustainable Development}
                            &                           &                                   \\
    \end{tabularx}
\end{document}

in above mwe i use thead from makecel for column headers and also change the way how to color table. with this the table code is shorter and more clear. I also removed not used last column l.

Addendum: After almost four year ... Now is available new table type tabularray, which is based on LaTeX3. It introduce new paradigm of table settings. In your case using it the packages hhline, makecell, multirow and tabularx are not needed anymore, the code is simpler and more concise (and consequently shorter).

\documentclass{article}
\usepackage[a4paper,margin=1in]{geometry}
\usepackage[table]{xcolor}
\usepackage{tabularray}

\definecolor{headers}{RGB}{0,137,182}
\definecolor{M1}{RGB}{163,195,217}
\definecolor{M2}{RGB}{155,214,220}

\begin{document}
    \begin{tblr}{
colspec ={X[1.3] X[2] X[1]},
hlines = {white,1pt},
vlines = {white,1pt},
row{1}  = {headers, font=\bfseries, fg=white},
row{2}  = {M1},
row{3-9}  = {M2},
cell{3}{1} = {r=7,c=1}{l,M2},
%
colsep=3pt, rowsep=3pt
                }
Ministries                  &   National Agencies   &   Regional Agencies   \\
Ministry of the Interior    &                       & Regional Council of Souss-Massa       \\
Ministry of Energy, Mines, and Sustainable Development
                            &    National Office for Electricity and Drinking Water (ONEE)  \\
                            &                       &                                       \\
                            &                       &                                       \\
                            &                       &                                       \\
                            &                       &                                       \\
                            &                       &                                       \\
                            &                       &                                       \\
    \end{tblr}
\end{document}

In comparison to the first solution, the result is much better as before (no problems with hlines: