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i don't know TikZ, do you think it would be possible to do this simply using tabularx ?

below my entire code. It compiles fine with xelatex on windows.
\documentclass[6pt]{article}
\usepackage[left=0.5in,right=0.5in,top=0.15in,bottom=2cm]{geometry}
\usepackage[utf8]{inputenc}

\usepackage{multicol}
\usepackage{multirow}
\usepackage{graphicx}
\usepackage{adjustbox}

\usepackage{float ...

it seems to work with \hhline{~----}
but some vertical white lines are added at the beginnig and end of row (see attachement)

--
no change (see attachment),
i need to have first column of table not underlined.

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Hi all,

i try to make a table like i send you here in attachement but my code failed, it seems to be an incompatibility
between tabu package and hhline.
My code:

\definecolor{SGblue}{RGB}{0, 164, 196}
\definecolor{SGblue}{RGB}{0, 164, 196}
{
\setlength\arrayrulewidth{0.8pt}
\renewcommand ...