How to remove blank spaces around table rules

Question

I am trying to produce a colored table but the separation lines and the border lines are creating blank spaces that ruins the aesthetics of the table. I wish to remove them.

Here is the code I'm using

\usepackage{multirow}
\usepackage{booktabs}
\usepackage{hhline}
\usepackage[table]{xcolor}

\begin{document}

\begin{table}[h]
\centering
\begin{tabular}{l*8cl}
\toprule
\rowcolor[HTML]{A4CAF6} 
\multicolumn{1}{c}{\cellcolor[HTML]{A4CAF6}}                            & \multicolumn{8}{c}{\cellcolor[HTML]{A4CAF6}Temperatura $[^{\circ}C]$} & \cellcolor[HTML]{A4CAF6}                             \\ \cmidrule(lr){2-9}
\rowcolor[HTML]{A4CAF6} 
\multicolumn{1}{c}{\multirow{-2}{*}{\cellcolor[HTML]{A4CAF6}Propiedad}} & 25     & 50     & 100     & 150    & 200    & 250    & 300    & 350    & \multirow{-2}{*}{\cellcolor[HTML]{A4CAF6}Referencia} \\
\rowcolor[HTML]{FFFFC7} 
$Rp_{0,2} [MPa]$                                                          &        &        &         &        &        &        &        &        &                                                      \\ 
\rowcolor[HTML]{CFCFCF} 
$UTS [MPa]$                                                               &        &        &         &        &        &        &        &        &                                                      \\ \bottomrule
\end{tabular}
\end{table}

\end{document}

Use \hline instead of \toprule and \bottomrule and \hhline{~--------~} instead of \cmidrule. — leandriis, May 07 '20 at 17:38
See also: Problems with \rowcolors and booktabs, Booktabs and colortbl not filling height of row and \rowcolor not shading properly — leandriis, May 07 '20 at 17:40
Side note: You might want to add \usepackage{siunitx} and use [\si{\celsius}] instead of $[^{\circ}C]$ . — leandriis, May 07 '20 at 17:41
I stopped using \hline because it didn't show when extracted to a pdf. Although I did use \hhline as you sagguested but the problem persists. It generates a white line of the same width. — Patricio, May 07 '20 at 20:23
\hhline{>{\arrayrulecolor[HTML]{A4CAF6}}->{\arrayrulecolor{black}}-------->{\arrayrulecolor[HTML]{A4CAF6}}->{\arrayrulecolor{black}}} should remove the small white gap — leandriis, May 07 '20 at 20:40

score 1 · Answer 1 · answered May 13 '20 at 07:20

1

With the lastest version of nicematrix (4.0 of 2020/05/08), you can have the result easily (you need several compilations).

\documentclass{article}
\usepackage{multirow}
\usepackage{booktabs}
\usepackage{siunitx}

\usepackage{nicematrix}

\definecolor{myblue}{HTML}{A4CAF6}
\definecolor{myyellow}{HTML}{FFFFC7}
\definecolor{mygray}{HTML}{CFCFCF}

\begin{document}

\begin{table}[h]
\centering
\begin{NiceTabular}{L*{8}{C}L}[code-before = \rowcolor{myblue}{1,2} \rowcolor{myyellow}{3} \rowcolor{mygray}{4}]
\toprule
\multirow{2}{*}{Propiedad} & \multicolumn{8}{C}{Temperatura [\si{\celsius}]} & \multirow{2}{*}{Referencia}\\
\cmidrule{2-9}
 & 25 & 50 & 100 & 150 & 200 & 250 & 300 & 350 \\
R\textsubscript{p0,2} [\si{\mega\pascal}] \\
UTS [\si{\mega\pascal}] \\
\bottomrule
\end{NiceTabular}
\end{table}

\end{document}

answered May 13 '20 at 07:20

F. Pantigny

40,250

Nice new features of nicematrix. A question: is possible to add more vertical space to table cells ( I steal read new documentation)? +1! – Zarko May 13 '20 at 11:27
I assume you bother about the yellow gray rows. It's possible to use \extrarowheight and \arraystretch as usual. However, in this case, these parameters would also affect the blue zone which is perfect. It's possible to use \\[...] as usual but such a tuning beetween the yellow row and the gray one would increase the depth of the yellow row and not the height of the gray one. Eventually, I don't see other mean than adding manual struts in the yellow and gray rows... – F. Pantigny May 13 '20 at 12:02
Francly said, I hope that there is way to use for example cellspace. I will make some more test late evening. – Zarko May 13 '20 at 12:09
In this answer, since version 5.0 of nicematrix one must write l*{8}{c}l instead of L*{8}{C}L in the preamble of {NiceTabular} (but there is an option for backward compatibility). – F. Pantigny Jul 18 '20 at 20:56

score 0 · Answer 2 · answered May 09 '20 at 08:53

Here is my suggestion. In order to get rid of the white line, you can use \hhline{>{\arrayrulecolor[HTML]{A4CAF6}}->{\arrayrulecolor{black}}-------->{\arrayrulecolor[HTML]{A4CAF6}}->{\arrayrulecolor{black}}}. This will fill the white gap with a line in the same color as the background.

Instead of repeating the HTML color definition over and over, I suggest defining the color in the preamble and using this predefined color throughout your document. This will make thing much easier if you later on decide to change the color. You will then only have to chenge the definition in the preamble instead of changing the color of every single cell. In the following MWE I have used such a globally defined color.

I have also added the siunitx package for the units °C and MPa. I have also changed the code for Rp0,2 and UTS (assuming that these correpsond to yield strength and ultimate tensile strength) since using math mode for abbreviations is not recommended. If you want UTS to show up in italic, use \textit{UTS} instead.

For the second table, I have added the cellspace packagein order to add some vertical space above and below the text in each cell to avoid overlap with the horizontal lines.

\documentclass{article}
\usepackage{multirow}
\usepackage{booktabs}
\usepackage{hhline}
\usepackage[table]{xcolor}
\usepackage{siunitx}

\definecolor{myblue}{HTML}{A4CAF6}
\definecolor{myyellow}{HTML}{FFFFC7}
\definecolor{mygray}{HTML}{CFCFCF}

\usepackage[column=0]{cellspace}
\setlength\cellspacetoplimit{0.5\tabcolsep}
\setlength\cellspacebottomlimit{\cellspacetoplimit}
\begin{document}

\begin{table}[h]
\centering
\begin{tabular}{l*8cl}
\hline
\rowcolor[HTML]{A4CAF6} 
\multicolumn{1}{c}{\cellcolor{myblue}}                            & \multicolumn{8}{c}{\cellcolor{myblue}Temperatura [\si{\celsius}]} & \cellcolor{myblue}                             \\ 
\hhline{>{\arrayrulecolor{myblue}}->{\arrayrulecolor{black}}-------->{\arrayrulecolor{myblue}}->{\arrayrulecolor{black}}}
\rowcolor{myblue} 
\multicolumn{1}{c}{\multirow{-2}{*}{\cellcolor{myblue}Propiedad}} & 25     & 50     & 100     & 150    & 200    & 250    & 300    & 350    & \multirow{-2}{*}{\cellcolor{myblue}Referencia} \\
\rowcolor{myyellow} 
R\textsubscript{p0,2} [\si{\mega\pascal}]                                                          &        &        &         &        &        &        &        &        &                                                      \\ 
\rowcolor{mygray} 
UTS [\si{\mega\pascal}]                                                               &        &        &         &        &        &        &        &        &                                                      \\ \hline
\end{tabular}
\end{table}


\begin{table}[h]
\centering
\begin{tabular}{0l*{8}{0c}0l}
\hline
\rowcolor[HTML]{A4CAF6} 
\multicolumn{1}{c}{\cellcolor{myblue}}                            & \multicolumn{8}{c}{\cellcolor{myblue}Temperatura [\si{\celsius}]} & \cellcolor{myblue}                             \\ 
\hhline{>{\arrayrulecolor{myblue}}->{\arrayrulecolor{black}}-------->{\arrayrulecolor{myblue}}->{\arrayrulecolor{black}}}
\rowcolor{myblue} 
\multicolumn{1}{c}{\multirow{-2}{*}{\cellcolor{myblue}Propiedad}} & 25     & 50     & 100     & 150    & 200    & 250    & 300    & 350    & \multirow{-2}{*}{\cellcolor{myblue}Referencia} \\
\rowcolor{myyellow} 
R\textsubscript{p0,2} [\si{\mega\pascal}]                                                          &        &        &         &        &        &        &        &        &                                                      \\ 
\rowcolor{mygray} 
UTS [\si{\mega\pascal}]                                                               &        &        &         &        &        &        &        &        &                                                      \\ \hline
\end{tabular}
\end{table}

\end{document}

How to remove blank spaces around table rules

2 Answers2