diff --git a/frontend/packages/shared/src/theme.css b/frontend/packages/shared/src/theme.css
index e7f696d8..3f73a751 100644
--- a/frontend/packages/shared/src/theme.css
+++ b/frontend/packages/shared/src/theme.css
@@ -29,7 +29,7 @@
      a swap. Each is pixel-identical to its prior literal under the
      default palette: --crust is a darkened bg; --muted / --subtext0 are
      foreground↔background blends (two levels of dimmed text). */
-  --crust: color-mix(in srgb, var(--base00) 58%, #000); /* terminal / code bg, below --bg */
+  --crust: color-mix(in srgb, var(--base00) 58%, #000000); /* terminal / code bg, below --bg */
   --muted: color-mix(in srgb, var(--base05) 55.5%, var(--base00)); /* secondary / dimmed text */
   --subtext0: color-mix(in srgb, var(--base05) 77.7%, var(--base00)); /* toolbar/status text; dimmer than --fg, lighter than --muted */
 }
diff --git a/scripts/check-issue-refs.sh b/scripts/check-issue-refs.sh
index 6b8cdbf5..5cec3d3e 100755
--- a/scripts/check-issue-refs.sh
+++ b/scripts/check-issue-refs.sh
@@ -13,13 +13,15 @@
 #
 # Scope: tracked *.rs *.nix *.js *.ts *.css *.html. Markdown is exempt
 # (prose docs may legitimately cite the tracker). The pattern matches a
-# hash, 2-5 digits, then a non-hex char or end-of-line: that trailing
-# class skips CSS hex colours (letter-bearing or 6/8-digit) while still
-# catching tracker tags. Residual: a pure-numeric short hex (e.g. three
+# hash, 2-5 digits, then a non-alphanumeric char or end-of-line. A real
+# tracker tag is never glued to a letter, so the trailing class skips
+# both letter-bearing / 6-8-digit hex colours (the digit run breaks or
+# overruns) and digit-runs followed by a letter — e.g. hash-route
+# fragments like #24h. Residual: a pure-numeric short hex (e.g. three
 # identical digits) trips it — write the six-digit form to dodge.
 set -eu
 
-pattern='#[0-9]{2,5}([^0-9a-fA-F]|$)'
+pattern='#[0-9]{2,5}([^0-9a-zA-Z]|$)'
 
 # `/dev/null` forces grep to always print a filename prefix, even when
 # xargs hands it a single file. `-r`/`-0` keep it robust to odd paths