I've got few tables created with few packages included booktabs where I use the command \rowcolors from the xcolor package. But in the last I notice that the colour is wider that the lines of the same table. Since the way to create the tables and the packages used in all are the same I don't know what could happen. This is my MWE:
\documentclass[fontsize=10pt,paper=letter,headings=big,bibliography=totoc,DIV=8]{scrbook}
\KOMAoptions{headsepline=true,draft=false}
\usepackage{typearea}
\usepackage[usenames,dvipsnames,x11names,table]{xcolor}
\usepackage[single=false,macros=false,xspace=false]{acro}
\usepackage[spanish,mexico]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[sc,osf]{mathpazo}
\usepackage[defaultsans]{opensans}
\usepackage{array,multirow,tabularx,ragged2e,booktabs}
\newcolumntype{Y}{>{\RaggedRight\arraybackslash\hspace{0pt}}X}
\newcolumntype{C}{>{\centering\arraybackslash\hspace{0pt}}X}
\usepackage{rotating}
\usepackage{colortbl}
\usepackage[per-mode=symbol]{siunitx}
\DeclareSIUnit\poise{P}
\DeclareSIUnit\stokes{St}
%\DeclareSIUnit\radian{rad}
\DeclareSIUnit\dyna{dyn}
\begin{document}
\begin{table}
\centering
\rowcolors{2}{}{lightgray!20}
\begin{tabularx}{3.4in}{@{} CS[table-format=4.4] @{}}
\toprule
Propiedades materiales en la media & Valor \\
\midrule
$c_M$ & \SI{3.0}{[\kilo\pascal]} \\
$k_{1_M}$ & \SI{2.3632}{[\kilo\pascal]} \\
$k_{2_M}$ & \num{0.8393} \\
$\beta_M$ & \ang{29.0} \\
$\kappa_M$ & \SI{1000}{[\mega\pascal]}\\
\midrule
Propiedades materiales en la adventicia & Valor \\
\midrule
$c_A$ & \SI{0.3}{[\kilo\pascal]} \\
$k_{1_A}$ & \SI{0.5620}{[\kilo\pascal]} \\
$k_{2_A}$ & \num{0.7112} \\
$\beta_A$ & \ang{62.0} \\
$\kappa_A$ & \SI{1000}{[\mega\pascal]} \\
\bottomrule
\end{tabularx}
\caption[Parámetros materiales de la arteria]{Parámetros materiales de la arteria en sus dos túnicas externas: media y adventicia.}
\label{taula:param}
%\setfloatalignment{t}
\end{table}
\begin{table}
\centering
\rowcolors{2}{}{lightgray!20}
\begin{tabularx}{3.2in}{@{} lYS[table-format=4.4] @{}}
\toprule
\multicolumn{2}{c}{Propiedades materiales} & Valor \\
\midrule
\multirow{2}{*}{\rotatebox{90}{{\footnotesize Sangre}}}
& $\rho_s$ & \SI{1060}{[\kilo\gram\per\metre^3]} \\
& $\mu_{s}$ & \SI{3.8e-6}{[\metre^2\per\second]} \\
\midrule
\rowcolor{white} \multicolumn{3}{c}{Modelo hiperelástico de Mooney-Rivlin}\\
\midrule
\multirow{6}{*}{\rotatebox{90}{{\footnotesize Arteria}}}
& $C_1$ & \SI{0.020}{[\mega\pascal]} \\
& $C_2$ & \SI{0.003}{[\mega\pascal]} \\
& $C_3$ & \SI{0.175}{[\mega\pascal]} \\
& $C_4$ & \SI{0.090}{[\mega\pascal]} \\
& $C_5$ & \SI{0}{[\mega\pascal]} \\
& $C_6$ & \SI{0}{[\mega\pascal]} \\
\midrule
\multicolumn{3}{c}{Modelo hiperelástico de Mooney-Rivlin}\\
\midrule
\multirow{6}{*}{\rotatebox{90}{{\footnotesize Placa}}}
& $C_1$ & \SI{-0.452}{[\mega\pascal]} \\
& $C_2$ & \SI{0.510}{[\mega\pascal]} \\
& $C_3$ & \SI{0.101}{[\mega\pascal]} \\
& $C_4$ & \SI{1.256}{[\mega\pascal]} \\
& $C_5$ & \SI{0}{[\mega\pascal]} \\
& $C_6$ & \SI{0.301}{[\mega\pascal]} \\
\bottomrule
\end{tabularx}
\caption[Parámetros materiales de la sangre, arteria y placa]{Parámetros materiales de la sangre, arteria y placa que los definen como materiales para COMSOL.}
\label{taula:sangue}
\end{table}
\end{document}
Both tables have the same problem, but the second one has a difficult more: I try to add a column with text rotated 90º, but I don't know how to fit it for use the same colour scheme without cover with the colour part of that rotated column... if it is possible.
