JSFiddle - React, Tailwind, and code Playground
HTML
<svg id="Group_2" data-name="Group 2" xmlns="http://www.w3.org/2000/svg" width="1000" height="500" viewBox="0 0 1000 500">
<g id="Rectangle_82" data-name="Rectangle 82" fill="#fff" stroke="#707070" stroke-width="1">
<rect width="1000" height="500" stroke="none"/>
<rect x="0.5" y="0.5" width="999" height="499" fill="none"/>
</g>
<line id="line" data-name="Line 4" x2="700" transform="translate(150.5 250.5)" fill="none" stroke="#707070" stroke-width="1"/>
<line id="lines" data-name="Line 4" x2="700" transform="translate(150.5 250.5)" fill="none" stroke="#707070" stroke-width="1"/>
</svg>
CSS
#line {
stroke: #343C4A;
stroke-width:70px;
stroke-linecap: round;
}
#lines {
stroke: #646D7D;
stroke-width: 40px;
stroke-linecap: round;
}