How can I trigger a "dark mode" version of a brand?

[coatless]

Description

So, I've been toying around more with the _brand.yml inside of a Quarto website. Though, I can't see any documentation on enabling a Dark mode. I assumed that this would be possible with the light and dark keys under theme. That said, I did notice that in the pre-release documentation there isn't support for a dark mode logo; however, the docs were scarce with respect to the theme toggle between dark & light.

If its not possible yet, could this feature be added before v1.6 is released?

Specifically, maybe some aliases for theme of brand-dark & brand-light (with brand defaulting to light).

format: 
   html: 
      theme: 
         light: brand
         dark: brand-dark

Dark mode is a fan favorite ;)

[gordonwoodhull]

1.6 is just about released. You are correct that dark mode is only partly supported.

We should be working on dark mode in the 1.7 timeframe.

[cscheid]

To give a bit more background -

Besides "we ran out of time", the main reason we didn't implement dark mode for _brand.yml in Quarto 1.6 is that dark mode itself could use a revamp, and we didn't want the _brand.yml work to be hindered by a weak Quarto feature. We needed to improve a number of SCSS features in 1.6 because of _brand.yml; 1.7 will hopefully have the dark mode changes required to make _brand.yml dark mode solid.

[coatless]

@cscheid like always, no worries. Happy to know the dark mode fan favorite will get better support going forward!

One minor suggestion: Add a note into the pre-release/brand documentation page emphasizing dark mode is not available for branding.

[coatless]

Addressed in #12319

So, dark mode will be available in a 1.7 prerelease soon (tm)!

[gordonwoodhull]

Yeah, we've long had switchable dark mode for themes, now we have "dark brand" which extends this to brands.

Also see #12277, a way to render plots/tables using light and dark brands and switch them using CSS, and #12173 eliminating flashing when loading pages in dark mode. Big upgrade for dark mode in this release!

[coatless]

Sorry, I wrote that too quick. I'm 100% aware of dark mode existing in quarto before brand yml; but, now I can use dark mode with brand yml.

(P.S. I saw the other PRs leading into #12319. I held off until I saw the "feature: dark brand" PR get closed (~15 mins 😄 ))