A helm is a ship's wheel — the thing you steer with. All six are built on that, drawn on the same 64×64 grid, monoline, and set in currentColor so a single file works on white, on black, and inside a wordmark without a second version. Each is shown big on light, then small on dark, because 16px is where logos actually die — that's the favicon.
Hit Copy SVG and paste it inline — no image file, no request, and it inherits text colour. Option 01 is already in place on design 07 (Simple); swap it by replacing the <svg> block marked with a comment.
For a favicon, the same file works — but hard-code the colour, since currentColor has nothing to inherit from in a browser tab:
<link rel="icon" href="/favicon.svg" type="image/svg+xml"> <!-- in favicon.svg, replace stroke="currentColor" with stroke="#000" -->