diff --git a/crates/snowbound/src/main.rs b/crates/snowbound/src/main.rs
index 653f4da33a08618cf2912148679a52063101220a..acdf9b164c8b79803770cb0b23cd9801e9199fcc 100644
--- a/crates/snowbound/src/main.rs
+++ b/crates/snowbound/src/main.rs
@@ -1474,7 +1474,7 @@ impl State {
             && self.locked.is_none();
         self.toolbar(&theme, !welcome)?;
         if welcome {
-            self.welcome(&theme);
+            self.welcome();
             return Ok((section, Id::ROOT, None));
         }
         self.ui.open(
@@ -1704,7 +1704,7 @@ impl State {
             recycle::bar(&mut self.ui);
         }
         if self.session.is_none() && self.locked.is_some() {
-            self.locked_page(&theme);
+            self.locked_page();
             self.ui.close();
             self.ui.close();
             self.ui.close();
@@ -1717,7 +1717,7 @@ impl State {
             return Ok((section, open_tab, None));
         }
         if let Some(library) = self.sectionless.clone().filter(|_| self.session.is_none()) {
-            self.no_sections(&theme, library);
+            self.no_sections(library);
             self.ui.close();
             self.ui.close();
             self.ui.close();
@@ -4193,6 +4193,20 @@ impl State {
         .colored(self.view.editor.page_color())
     }
 
+    /// The colours of what the page area shows in place of a page, which follow the page's:
+    /// the light theme's on white pages, as Pages Match UI Theme off keeps them in a dark
+    /// appearance.
+    pub(crate) fn page_area_theme(&self) -> Theme {
+        if self.light_pages {
+            Theme {
+                accent: self.ui.theme.accent,
+                ..Theme::light()
+            }
+        } else {
+            self.ui.theme.clone()
+        }
+    }
+
     /// Paints the interface with the page in its box.
     fn paint(&mut self, target: &draw::Target) -> Result<(), Box<dyn Error>> {
         let start = Instant::now();
diff --git a/crates/snowbound/src/protection.rs b/crates/snowbound/src/protection.rs
index 9c0c3c6aee01dc2716c463159c292ac5f92839bf..23a30e49e635cd180b2268358f33464f423c843e 100644
--- a/crates/snowbound/src/protection.rs
+++ b/crates/snowbound/src/protection.rs
@@ -2,7 +2,7 @@
 //! dialogs that unlock one and set, change or remove its password, Lock All, and locking a
 //! section after a while unused or as it is left. Keys live in memory only (`Library`).
 
-use crate::{Command, Library, State, Theme, art, manage::Structure};
+use crate::{Command, Library, State, art, manage::Structure};
 use accesskit::Role;
 use std::{error::Error, sync::Arc, time::Duration};
 use ui::{Anchor, Axis, Flags, Id, Spec, Ui, children, fill, px};
@@ -155,11 +155,13 @@ impl State {
     }
 
     /// The locked section's page, as OneNote 2010 draws it: a click or Enter unlocks.
-    pub(crate) fn locked_page(&mut self, theme: &Theme) {
+    pub(crate) fn locked_page(&mut self) {
         let Some(locked) = &self.locked else {
             return;
         };
         let (library, path) = (Arc::clone(&locked.library), locked.path.clone());
+        let theme = &self.page_area_theme();
+        let chrome = std::mem::replace(&mut self.ui.theme, theme.clone());
         let ui = &mut self.ui;
         let entered =
             ui::popup::navigation(ui, &[notice()], &[NamedKey::Enter]).contains(&NamedKey::Enter);
@@ -229,6 +231,7 @@ impl State {
         ui.close();
         ui.close();
         ui.close();
+        ui.theme = chrome;
         if ui.signal(open).clicked || entered {
             self.ask_password(library, path, Dialog::Unlock(Zeroizing::default(), false));
         }
diff --git a/crates/snowbound/src/sidebar.rs b/crates/snowbound/src/sidebar.rs
index 140ce8754ba58f5897bf2dc0c1f32a92679b739d..4c2d22fd082e84e321d72221463f299141a786ea 100644
--- a/crates/snowbound/src/sidebar.rs
+++ b/crates/snowbound/src/sidebar.rs
@@ -1150,7 +1150,7 @@ impl crate::State {
 
     /// The window below the title bar on the first run, or once every notebook is closed:
     /// what is missing, and the ways to start.
-    pub(crate) fn welcome(&mut self, theme: &Theme) {
+    pub(crate) fn welcome(&mut self) {
         let id = self.ui.id("welcome");
         #[cfg(target_os = "linux")]
         let install = crate::desktop::installable().then_some((
@@ -1163,9 +1163,7 @@ impl crate::State {
         let install = None;
         let servers = self.servers.clone();
         self.notice(
-            theme,
             id,
-            theme.base,
             "No notebooks open",
             &servers,
             [
@@ -1202,7 +1200,7 @@ impl crate::State {
 
     /// The page's place while notebook `library` has no sections, as OneNote 2010 shows
     /// it, with a button to add one; or while none is on this computer yet.
-    pub(crate) fn no_sections(&mut self, theme: &Theme, library: Arc<Library>) {
+    pub(crate) fn no_sections(&mut self, library: Arc<Library>) {
         let downloading = library.downloading();
         let new = crate::Command::Structure(
             library,
@@ -1219,27 +1217,27 @@ impl crate::State {
                 vec![("new", art::PLUS, "New Section", new)],
             )
         };
-        self.notice(theme, id, theme.strip, title, &[], buttons);
+        self.notice(id, title, &[], buttons);
     }
 
-    /// A box `id` filled with `background`, showing `title` above `buttons` in its middle: each
+    /// A box `id` in the page's colours, showing `title` above `buttons` in its middle: each
     /// a part, an icon, a label and what it does; then the saved `servers` to reconnect to.
     fn notice(
         &mut self,
-        theme: &Theme,
         id: ui::Id,
-        background: [f32; 4],
         title: &str,
         servers: &[String],
         buttons: Vec<(&str, &'static [&'static str], &str, crate::Command)>,
     ) {
         const BUTTON: [f32; 2] = [240.0, 32.0];
+        let theme = self.page_area_theme();
+        let chrome = std::mem::replace(&mut self.ui.theme, theme.clone());
         let [left, top, right, bottom] = self.ui.rect(id).unwrap_or_default();
         self.ui.open_as(
             id,
             Spec {
                 size: [fill(), fill()],
-                fill: Some(background),
+                fill: Some(theme.paper),
                 ..Spec::default()
             },
         );
@@ -1292,6 +1290,7 @@ impl crate::State {
         let saved = crate::server::saved_servers(&mut self.ui, servers);
         self.ui.close();
         self.ui.close();
+        self.ui.theme = chrome;
         if let Some(saved) = saved {
             self.saved_server(saved);
         }