(Quick preface: this is not about the design <i>technique</i>, which is fine, but rather <i>using</i> icons like this on the web, or as favicons.)<p>I'm going to buck the trend here and just say: designing 16x16 icons for software should be dead (except as hobby/art, like for pixellated-style video games, etc.).<p>When the future is going towards retina displays, fluidly zoomable interfaces, and whatnot, this is a huge step <i>backwards</i>.<p>If you have an interface with 16x16 icons that are <i>necessary</i> to understand, then they should be dead simple -- arrows, circles, stars and whatnot. Not monstrosities like the GitHub icons [1] where they try to pack icons on top of icons in a tiny space. Icons next to text should have no more complexity than the letterforms themselves -- the letterforms have been chosen to be a legible size that doesn't strain your eyes, and icons should never go beyond that. And they should be icon <i>fonts/etc</i>, so they look good on retina/zoomed.<p>On the other hand, there are 16x16 icons that serve purely as illustrations -- application and document-type icons, for example, or list view in the OSX Finder. In this case, it's <i>pointless</i> to aim for clear distinctions, because there just isn't enough space, and it's too small anyways. A scaled-down version of the normal icon is <i>fine</i>, even if it's a little blurry or whatever. Just seeing a vaguely familiar orange and blue ball next to the text "Firefox" is fine -- nobody ever uses (or should use) 16x16 icons of this nature without a label next to them. Plus, again, with retina/web zooming, all the work to design a "special" 16x16 icon is for naught.<p>The Hacker News favicon is a great example of a <i>good</i> icon design -- easily recognizable, scalable, not too busy, no special treatment needed.<p>The frog in this example, with all the other icons at the end, is exactly the kind of thing that should <i>never</i> be used as a favicon, or anywhere on the web, really. They look fine when enlarged (like the Nintendo, with its tiny resolution blown up on a TV), but are terrible on modern screens. The favicon of the page itself, while apparently a bird, looks just as much like a school bus driving into a lake, or a piece of abstract art, when I see it in my browser tab.<p>[1] <a href="https://github.com/styleguide/css/7.0" rel="nofollow">https://github.com/styleguide/css/7.0</a>