feature: light and dark logo

news/changelog-1.8.md

@@ -20,11 +20,13 @@ All changes included in 1.8:
 - ([#5538](https://github.com/quarto-dev/quarto-cli/issues/5538)): Fix code-copy button style so that scrolling behaves properly.
 - ([#10983](https://github.com/quarto-dev/quarto-cli/issues/10983)): Fix spacing inconsistency between paras and first section headings.
 - ([#12259](https://github.com/quarto-dev/quarto-cli/issues/12259)): Fix conflict between `html-math-method: katex` and crossref popups (author: @benkeks).
+- ([#12341](https://github.com/quarto-dev/quarto-cli/issues/12341)): Enable light and dark logos for html formats (sidebar, navbar, dashboard).
 - ([#12734](https://github.com/quarto-dev/quarto-cli/issues/12734)): `highlight-style` now correctly supports setting a different `light` and `dark`.
 - ([#12747](https://github.com/quarto-dev/quarto-cli/issues/12747)): Ensure `th` elements are properly restored when Quarto's HTML table processing is happening.
 - ([#12766](https://github.com/quarto-dev/quarto-cli/issues/12766)): Use consistent equation numbering display for `html-math-method` and `html-math-method.method` for MathJax and KaTeX (author: @mcanouil)
 - ([#12797](https://github.com/quarto-dev/quarto-cli/issues/12797)): Allow light and dark brands to be specified in one file, by specializing colors with `light:` and `dark:`.
 - ([#12919](https://github.com/quarto-dev/quarto-cli/issues/12919)): Ensure `kbd` shortcode output has hover tooltip.
+- ([#12981](https://github.com/quarto-dev/quarto-cli/issues/12981)): Brand should be applied in dark mode when dark mode is enabled by the theme, not the brand.
 
 ### `revealjs`
 

src/command/render/render-contexts.ts

@@ -86,6 +86,7 @@ import {
 import { ExtensionContext } from "../../extension/types.ts";
 import { NotebookContext } from "../../render/notebook/notebook-types.ts";
 import { safeCloneDeep } from "../../core/safe-clone-deep.ts";
+import { darkModeDefaultMetadata } from "../../format/html/format-html-info.ts";
 
 export async function resolveFormatsFromMetadata(
   metadata: Metadata,
@@ -569,8 +570,16 @@ async function resolveFormats(
 
     // resolve brand in project and forward it to format
     const brand = await project.resolveBrand(target.source);
-    mergedFormats[format].render.brand = brand;
-
+    if (brand) {
+      mergedFormats[format].render.brand = {
+        light: brand.light,
+        dark: (brand.enablesDarkMode ||
+            darkModeDefaultMetadata(mergedFormats[format].metadata) !==
+              undefined)
+          ? brand.dark
+          : undefined,
+      };
+    }
     // apply defaults from brand yaml under the metadata of the current format
     const brandFormatDefaults: Metadata =
       (brand?.light?.data?.defaults?.quarto as unknown as Record<