Herald keeps its theme.yaml config_schema to publication-blog options.
Here's what each one does, and what this demo site actually has set.
color_scheme
One of eight curated presets. Default blue uses Casper's sky accent
(#3eb0ef) with matched light/dark surfaces. This demo turns on the
visitor scheme switcher so you can try the others.
scheme_switcher
On in this demo. Swatch dropdown next to the dark-mode toggle; choice
persists in localStorage for this browser only.
default_dark
Off in this demo. Header toggle still switches at runtime. With no stored choice, OS light/dark preference decides (including with JS disabled).
Hero fields
hero_title, hero_subtitle, and hero_image drive the full-width home
masthead. This demo seeds a local Unsplash landscape under
themes/herald/static/demo/hero.jpg by
Sam Ferrara
(see CREDITS.md).
Author fields
default_author and default_avatar fill the feed and post meta when a
post doesn't set its own. This demo sets an author name so cards show it.
footer_text
Optional override for the footer line. Leave empty for the default © year · Powered by Dune line.
Cover photo by Glenn Carstens-Peters on Unsplash.