When coloring table rows, there is white space between the line and the \toprule and the \bottomrule

Question

As stated in the headline, I am trying to add color to my tables but it seems the booktab package leave extra white space between \toprule and \bottomrule that are not covered by \xcolor

\documentclass{article}
\usepackage{booktabs}
\usepackage[table]{xcolor}
\begin{document}
\renewcommand{\arraystretch}{1.5}
\rowcolors{1}{green}{blue}
\begin{tabular}{ll}
\toprule
foo&foo\\
bar&bar\\
foo&bar\\
\bottomrule
\end{tabular}
\end{document}

The problem does not occur when I used \hline instead. I would like to know if there is an easy fix and if it is not too much trouble, an explanation of what is going on here?Thanks in advance.

How to remove the space after \midrule in a table is closely related. — leandriis, May 23 '20 at 11:38
https://tex.stackexchange.com/questions/486181/color-a-table-with-toprule-and-cmidrule — hesham, May 23 '20 at 11:40
Here's a general (typographic) rule of thumb: Don't mix-and-mismatch visual metaphores. If you use color to highlight various rows of a table, it should not be necessary to use \toprule, midrule and \bottomrule to provide further visual structure. — Mico, May 23 '20 at 12:23

score 5 · Answer 1 · answered May 23 '20 at 13:33

The space is left over by the toprule and bottom rule-- which space can be separately colred by the command \aboverulesepcolor and \belowrulesepcolor set to the same color as the \rowcolor

\documentclass[12pt]{article} 

% set line spacing 
\usepackage{setspace} 
\setstretch{1.15} 
\usepackage{relsize} 

% table materials 
\usepackage{tabularx} 
\usepackage{booktabs} 
\usepackage{array} 
\usepackage{multirow} 

% define colours 
\usepackage{xcolor, colortbl} 
\definecolor{my-blue}{RGB}{83,87,118} 

\usepackage{microtype} 

\newcommand*{\belowrulesepcolor}[1]{% 
  \noalign{% 
    \kern-\belowrulesep 
    \begingroup 
      \color{#1}% 
      \hrule height\belowrulesep 
    \endgroup 
  }%
} 
\newcommand*{\aboverulesepcolor}[1]{% 
  \noalign{% 
    \begingroup 
      \color{#1}% 
      \hrule height\aboverulesep 
    \endgroup 
    \kern-\aboverulesep 
  }%
} 

\begin{document} 

\begin{center} 
\begin{tabular}{ccc} 
\toprule 
\belowrulesepcolor{green} 
\rowcolor{green} Variable &  Field One &  Field Two \\ 
\aboverulesepcolor{green} 
\midrule 
\belowrulesepcolor{blue} 
\rowcolor{blue}A & 0.0002 & 0.0005 \\ 
\aboverulesepcolor{blue}
\bottomrule  
\end{tabular} 
\end{center} 

\end{document}

The colors appear to bleed beyond the width of the table when using longtable. Any solution so works with longtable? — cpage, Mar 28 '21 at 20:26

F. Pantigny · Answer 2 · 2022-02-10T16:35:54.287

4

With {NiceTabular} of nicematrix, you have directly (after two compilations) the result you wish:

\documentclass{article}
\usepackage{booktabs}
\usepackage{xcolor}    
\usepackage{nicematrix}
\begin{document}
\renewcommand{\arraystretch}{1.5}
\begin{NiceTabular}{ll}
\CodeBefore 
   \rowcolors{1}{green!15}{blue!15}
\Body
\toprule
foo&foo\
bar&bar\
foo&bar\
\bottomrule
\end{NiceTabular}

\end{document}

edited Feb 10 '22 at 16:35

answered May 23 '20 at 14:35

F. Pantigny

40,250

When coloring table rows, there is white space between the line and the \toprule and the \bottomrule

2 Answers2

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