light-dark()

[clairity]

https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/light-dark

[6510]

No offense but how about bothering to finish Alternative Style Sheet selection?

   <link href="css.css" rel="stylesheet" title="Default Style" />
   <link href="a.css" rel="alternate stylesheet" title="light" />
   <link href="b.css" rel="alternate stylesheet" title="dark" />

Or is this not precisely the same thing?

https://html.spec.whatwg.org/multipage/links.html#rel-altern...

edit: with finish I mean use this for light/dark mode and fix it so that the preference chosen by the user is not immediately discarded after navigation. One doesn't discard user selected preferences. It is not done.

[cantSpellSober]

What if, in the future, we have more than two options (light and dark)?

@media (prefers-color-scheme: [name]) seems more extensible, but this feels simpler and easier to read.

Glad the function accepts custom properties (CSS "variables").

Should probably add a color property that doesn't use this function as a fallback for browsers that don't support it.

[romellem → cantSpellSober]

prefers-color-scheme only [accepts two values][0] at the moment: light and dark. However, they acknowledge this may not be fixed to this enum forever

> The values for this feature might be expanded in the future (to express a more active preference for light color schemes, or preferences for other types of color schemes like "sepia"). As such, the most future-friendly way to use this media feature is by negation such as (prefers-color-scheme: dark) and (not (prefers-color-scheme: dark)), which ensures that new values fall into at least one of the styling blocks.

[0]: https://drafts.csswg.org/mediaqueries-5/#prefers-color-schem...

[cantSpellSober → romellem]

That's what I was getting at, thanks for the reference!

[Kiuhrly1 → cantSpellSober]

There is already a media query for contrast preferences (increased or decreased) IIRC

[davidkunz]

I think `black` and `white` should be switched here:

color: light-dark(black, white);

[8n4vidtmkvmk → davidkunz]

I don't think so. You want black text on a light theme/background.

[davidkunz → 8n4vidtmkvmk]

Sorry, I misread your answer. You're right. I automatically assumed setting some background color for which `color: light-dark(white, black);` would be right.

[davidkunz → 8n4vidtmkvmk]

But why is the order switched below?

Functional notation: light-dark(light-color, dark-color)

[whiskers → davidkunz]

It's not.. `light-color` refers to the colour you want presented if the user's preference is for a "light" theme.

It's not declaring the relative brightness of the two colours - I agree it could be documented a little less ambiguously with something like `light-theme-color`.

[davidkunz → whiskers]

I got confused because I thought it would set a background color. For text it's inverted and hence correct.

[erhaetherth → davidkunz]

It sets the foreground/text color because it's used with the `color` property (https://developer.mozilla.org/en-US/docs/Web/CSS/color). You can use it to set the background color too in which case you'd do `background-color: light-dark(white, black);`