BL-025 - the last tint of the second brand blue, and the grep that missed it

help.js's search-focus ring was rgba(37,99,214,.15) - the banned #2563d6 as a
space-free rgb triple, which slid past color_check's spaced grep ('37, 99,
214') from the day BL-008 removed the colour. C4's recorded exception
legitimately allows rgba ALPHAS as opacity recipes; the defect was the base
colour under the alpha. Rebased onto THE blue: rgba(15,98,254,.15).

color_check compares space-free and case-insensitive now, in both the theme
check and the consumer sweep, so no spelling of the dead blue can return.

Items: BL-025 (closed), C4, BL-008 lineage.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/waves/backlog.md

@@ -538,7 +538,7 @@ deliberately deferred.
   drive-by CLAUDE.md forbids; the audit's job was to measure and document.
 - **Suggested wave or follow-up:** next revision, one task, using the T7.9 kit.
 
-### BL-025 — The second brand blue survives as one rgba focus tint in help.js
+### BL-025 — CLOSED 2026-08-20 (tint rebased onto THE blue; color_check greps space-free spellings)
 
 - **Found during:** the 2026-08-20 transparency fix (undefined-token sweep)
 - **Where:** `help.js`, the help-centre search input's `:focus` rule: