Jeff now supports Dark Mode in macOS 10.14

Over the years my site has evolved quite a bit; I started this site (well, one form of it at least) around 2004, when table based web design was still a thing. I've evolved the design from table-based to CSS, to semantic CSS, to CSS + RDF, then to mobile-first... and now that macOS 10.14 Mojave is here, with a snazzy (and way easier on my eyes) dark mode, I have made the design work well in both normal (light) and dark mode on macOS.

It's using a new feature in the Webkit nightly builds (er, now called Safari Technology Preview), a media query named (at least, for now) prefers-color-scheme.

And here's how the site looks when you're using Safari Technology Preview 68+ in macOS Mojave with Dark Mode:

Jeff in dark mode on macOS Mojave

It was pretty easy to add—just check out my dark-mode.css file. At its simplest, I started with:

@media (prefers-color-scheme: dark) {
  body {
    color: #ddd;
    background-color: #222;

But you can also default everything to a dark theme, then use the inverse query (prefers-color-scheme: light). There is a W3C proposal to make this new media query a standard adopted by all browsers—hopefully it gets adopted soon!

The key to using this setting well is being thorough in testing future color changes I make to the theme. Any change should be tested in both light and dark mode. If I don't test every element, every hover, every click, etc., I might make some elements unreadable or harder to use when changing colors between light and dark mode!

See's Release Notes for Safari Technology Preview 68 for more details on Safari's implementation.