Using the code given below, I am getting a black line over the word "Methods" due to hhline
. How shall I remove this black line or make it of same color as the background color so that it is not visible?
\documentclass{article}
\usepackage{hhline}
\usepackage[table]{xcolor}
\usepackage{array}
\usepackage{hhline}
\usepackage{multirow}
\definecolor{babyblue}{rgb}{0.54, 0.81, 0.94}
\definecolor{aliceblue}{rgb}{0.94, 0.97, 1.0}
\begin{document}
\begin{table}[]
\centering
\setlength\arrayrulewidth{1.3pt}
\footnotesize\setlength{\tabcolsep}{2.7 pt}
\renewcommand{\arraystretch}{1.4}
\begin{tabular}{|c|c|c|c|c|c|c|}
\hline
\cellcolor{aliceblue} & \multicolumn{2}{c|}{\cellcolor{babyblue}ISE} & \multicolumn{2}{c|}{\cellcolor{babyblue}IAE} & \multicolumn{2}{c|}{\cellcolor{babyblue}ITAE} \\ \hhline{-|-|-|-|-|-|-|} \cline{2-7}
\multirow{-2}{*}{\cellcolor{aliceblue} Methods}
& \cellcolor{aliceblue}-20\% & \cellcolor{aliceblue}+20\% & \cellcolor{aliceblue}-20\% & \cellcolor{aliceblue}+20\% & \cellcolor{aliceblue}-20\% & \cellcolor{aliceblue}+20\% \\ \hhline{-|*6-}
\rowcolor{babyblue}ABC & 0.5645 & 0.63 & 1.8 & 1.8 & 6.1 & 6.6 \\ \hhline{-|*6-}
\rowcolor{aliceblue}XYZ & 2.1 & 2.3 & 0.881 & 9.82 & 9.2 & 28.9 \\ \hhline{-|*6-}
\rowcolor{babyblue}MNO & 0.68 & 0.97 & 1.62 & 1.61 & 8.9 & 8.2 \\ \hhline{-|*6-}
\rowcolor{aliceblue} PQR & 0.65 & 0.753 & 2.064 & 2.231 & 28.04 & 28.56 \\ \hhline{-|*6-}
\end{tabular}
\end{table}
\end{document}