From 4dd7f490979da2cd7cccfcc755fec8da5b557320 Mon Sep 17 00:00:00 2001
From: Charlotte Wickham <cwickham@gmail.com>
Date: Wed, 7 Oct 2026 09:48:32 -0700
Subject: [PATCH] Reserve the red announcement banner for prerelease and fix
 its contrast

---
 _quarto-prerelease-docs.yml  |  3 ++-
 theme-dark.scss              |  2 +-
 theme-prerelease-banner.scss | 11 +++++++++++
 theme-prerelease-docs.scss   |  8 --------
 4 files changed, 14 insertions(+), 10 deletions(-)
 create mode 100644 theme-prerelease-banner.scss
 delete mode 100644 theme-prerelease-docs.scss

diff --git a/_quarto-prerelease-docs.yml b/_quarto-prerelease-docs.yml
index c3a997bc77..f88bef4f72 100644
--- a/_quarto-prerelease-docs.yml
+++ b/_quarto-prerelease-docs.yml
@@ -18,4 +18,5 @@ format:
   html:
     toc: true
     theme:
-      light: [cosmo, theme.scss, theme-prerelease-docs.scss]
+      light: [cosmo, theme.scss, theme-prerelease-banner.scss]
+      dark: [cosmo, theme-dark.scss, theme-prerelease-banner.scss]
diff --git a/theme-dark.scss b/theme-dark.scss
index 655f0e0d05..5231b63be0 100644
--- a/theme-dark.scss
+++ b/theme-dark.scss
@@ -183,7 +183,7 @@ details > summary {
   font-size: 1em;
   font-weight: bold;
   color: $white;
-  background-color: #ff0039; 
+  background-color: #447099; 
 }
 
 #quarto-announcement a {
diff --git a/theme-prerelease-banner.scss b/theme-prerelease-banner.scss
new file mode 100644
index 0000000000..ffc40d3e1e
--- /dev/null
+++ b/theme-prerelease-banner.scss
@@ -0,0 +1,11 @@
+/*-- scss:rules --*/
+
+// Red marks the prerelease site, in light and dark mode.
+// #e60033 gives white text 4.76:1 (WCAG 1.4.3 needs 4.5:1).
+// Cosmo's $danger (#ff0039) gives only 3.95:1.
+#quarto-announcement {
+  font-size: 1em;
+  font-weight: bold;
+  color: $white;
+  background-color: #e60033;
+}
diff --git a/theme-prerelease-docs.scss b/theme-prerelease-docs.scss
deleted file mode 100644
index 94a041338a..0000000000
--- a/theme-prerelease-docs.scss
+++ /dev/null
@@ -1,8 +0,0 @@
-/*-- scss:rules --*/
-
-#quarto-announcement {
-  font-size: 1em;
-  font-weight: bold;
-  color: $white;
-  background-color: $danger; 
-}
\ No newline at end of file