Germany
3:5
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 50 30">
<title>Flag of Germany</title>
<path d="M0 0h50v10H0Z" fill="#000"/>
<path d="M0 10h50v10H0Z" fill="#ff0000"/>
<path d="M0 20h50v10H0Z" fill="#ffcc00"/>
</svg>
Specs
Note
Ratios and colors from official document but RGB colors from the government's design style guide.