Give every palette colour a hex value an engine without oklch can read

CHANGELOG.md

@@ -6,6 +6,12 @@ at boot. Entries start at 0.3.0.
 
 ## Unreleased
 
+### Colours render on engines without `oklch()`
+
+The theme palette in `public/css/styles.css` is hex, not `oklch()`. On an engine older than
+Chromium 111 (Tizen 2024, webOS TV 24) the accent token was invalid, so the primary button was white
+text on no background. A plugin that overrides a palette token should use a hex value too.
+
 ### One horizontal inset across the content pane
 
 The topbar, filter bar, pager, form page and empty-table message inset their content by `--pad-x`

docs/reading-cost.md

@@ -0,0 +1,18 @@
+# Reading cost
+
+## Reading cost, chunk 57e864bce02a, finished 2026-10-30T23:59:00Z
+
+100624 new input tokens before the first commit.
+
+Read most (opens and searches):
+
+- `src/http/app.test.ts` 9
+- `README.md` 7
+- `src/http/app.ts` 4
+- `todo.md` 3
+- `e2e-tests/playwright.config.ts` 2
+- `AGENTS.md` 1
+- `CHANGELOG.md` 1
+- `ci.sh` 1
+- `examples/plugins/scheduling/views/shifts.ejs` 1
+- `src/auth/csrf.ts` 1

public/css/styles.css

@@ -21,27 +21,29 @@
    widgets (date picker, scrollbars, selects).
 ------------------------------------------------------------- */
 :root {
+  /* Hex, not oklch: an engine below Chromium 111 drops an oklch token and the primary button
+     loses its background. */
   /* ---- raw LIGHT palette ---- */
   --l-bg:#f3f3f4; --l-surface:#ffffff; --l-surface-2:#f6f6f7; --l-surface-3:#fbfbfc;
   --l-border:#e5e5e8; --l-border-2:#d6d6da;
   --l-text:#18181b; --l-text-muted:#6b6b73; --l-text-faint:#9a9aa2;
-  --l-accent:oklch(0.52 0.12 256); --l-accent-bg:oklch(0.96 0.03 256);
-  --l-accent-bd:oklch(0.82 0.07 256); --l-focus:oklch(0.52 0.14 256);
-  --l-pos:oklch(0.54 0.13 150); --l-pos-bg:oklch(0.95 0.03 150); --l-pos-bd:oklch(0.83 0.07 150);
-  --l-neg:oklch(0.55 0.18 25);  --l-neg-bg:oklch(0.96 0.03 25);  --l-neg-bd:oklch(0.85 0.08 25);
-  --l-warn:oklch(0.55 0.12 75); --l-warn-bg:oklch(0.96 0.04 85); --l-warn-bd:oklch(0.84 0.08 85);
-  --l-info:oklch(0.54 0.12 245);--l-info-bg:oklch(0.96 0.03 245);--l-info-bd:oklch(0.83 0.07 245);
+  --l-accent:#3669ac; --l-accent-bg:#e5f3ff;
+  --l-accent-bd:#a7c7f2; --l-focus:#2a68b7;
+  --l-pos:#258343; --l-pos-bg:#e1f5e4; --l-pos-bd:#a8d5b0;
+  --l-neg:#c53637;  --l-neg-bg:#ffebe8;  --l-neg-bd:#febab4;
+  --l-warn:#9a6500; --l-warn-bg:#fef0d4; --l-warn-bd:#e3c78e;
+  --l-info:#2274af;--l-info-bg:#e2f5ff;--l-info-bd:#a2cdf2;
 
   /* ---- raw DARK palette ---- */
   --d-bg:#0d0d0f; --d-surface:#161619; --d-surface-2:#1d1d22; --d-surface-3:#1a1a1e;
   --d-border:#2a2a31; --d-border-2:#3a3a43;
   --d-text:#ededf0; --d-text-muted:#9b9ba6; --d-text-faint:#6a6a74;
-  --d-accent:oklch(0.70 0.12 256); --d-accent-bg:oklch(0.32 0.06 256);
-  --d-accent-bd:oklch(0.48 0.08 256); --d-focus:oklch(0.74 0.13 256);
-  --d-pos:oklch(0.74 0.14 150); --d-pos-bg:oklch(0.30 0.05 150); --d-pos-bd:oklch(0.45 0.07 150);
-  --d-neg:oklch(0.74 0.16 25);  --d-neg-bg:oklch(0.30 0.07 25);  --d-neg-bd:oklch(0.47 0.10 25);
-  --d-warn:oklch(0.80 0.13 85); --d-warn-bg:oklch(0.31 0.05 80); --d-warn-bd:oklch(0.48 0.07 80);
-  --d-info:oklch(0.74 0.12 245);--d-info-bg:oklch(0.31 0.06 245);--d-info-bd:oklch(0.47 0.08 245);
+  --d-accent:#6ba0e8; --d-accent-bg:#1d3351;
+  --d-accent-bd:#3f5f8a; --d-focus:#72adfb;
+  --d-pos:#62c37a; --d-pos-bg:#1a3520; --d-pos-bd:#376040;
+  --d-neg:#ff7e76;  --d-neg-bg:#4b1d1b;  --d-neg-bd:#8a423d;
+  --d-warn:#e4b750; --d-warn-bg:#3e2d10; --d-warn-bd:#72592c;
+  --d-info:#65b2f1;--d-info-bg:#12334c;--d-info-bd:#305f85;
 
   /* ---- active mapping: default = LIGHT ---- */
   --bg:var(--l-bg); --surface:var(--l-surface); --surface-2:var(--l-surface-2); --surface-3:var(--l-surface-3);

src/ui/stylesheet-floor.test.ts

@@ -0,0 +1,14 @@
+import assert from "node:assert/strict";
+import { readdirSync, readFileSync } from "node:fs";
+import { dirname, join } from "node:path";
+import { test } from "node:test";
+import { fileURLToPath } from "node:url";
+
+const cssDir = join(dirname(fileURLToPath(import.meta.url)), "..", "..", "public", "css");
+
+test("no stylesheet declares an oklch() colour, which an engine below Chromium 111 drops", () => {
+  // A dropped custom property leaves var(--accent) invalid: white text on no background.
+  for (const file of readdirSync(cssDir).filter((f) => f.endsWith(".css"))) {
+    assert.ok(!/oklch\(/.test(readFileSync(join(cssDir, file), "utf8")), `${file} declares oklch()`);
+  }
+});

todo.md

@@ -12,7 +12,6 @@
 
 | ID | Release | Blocked by | Exempt | Item | L | E | I | R | S | Moves | Score |
 |---|---|---|---|---|---|---|---|---|---|---|---|
-| 30 | 0.4.21 |  | defect | **Give every `oklch()` colour a fallback, so primary buttons stay readable on an engine without it.** | 1 | 2 | 2 | 3 | 2 | 4 by 5 | 29.9 |
 | 29 | 0.4.21 |  | defect | **Show the whole nav tree on an engine without `:has()`, and fold it only where `:has()` works.** | 2 | 2 | 2 | 4 | 3 | 4 by 6 | 26.9 |
 | 31 | 0.4.21 |  |  | **Delete the design-preview rules in `public/css/auth.css` that no view uses.** | 1 | 1 | 1 | 1 | 2 | code health by 2, 8 by 1 | 13.3 |
 | 26 | 0.4.21 |  |  | **Add a domain glossary and the project's intended horizon to the README.** | 1 | 2 | 1 | 2 | 3 | 9 by 3, code health by 2 | 11.9 |
@@ -21,7 +20,7 @@
 | 24 | 0.4.21 |  |  | **Retire `src/ui/shell-context.ts` and render the dashboard from `ctx.chrome`.** | 2 | 1 | 2 | 3 | 4 | code health by 3 | 9.0 |
 | 17 | 0.4.21 |  |  | **Remove the icons no caller uses from `ICON_NAMES` and the sprite.** | 1 | 1 | 1 | 1 | 1 | 8 by 1, code health by 1 | 8.8 |
 | 21 | 0.4.21 |  |  | **Fail the gate on a function that exceeds a size or complexity limit.** | 3 | 1 | 1 | 3 | 5 | code health by 4 | 7.2 |
-| 32 | 0.4.21 | 29, 30 |  | **Fail the gate on a stylesheet feature the browser floor lacks, unless it is guarded.** | 3 | 1 | 1 | 3 | 4 | code health by 2 | 6.0 |
+| 32 | 0.4.21 | 29 |  | **Fail the gate on a stylesheet feature the browser floor lacks, unless it is guarded.** | 3 | 1 | 1 | 3 | 4 | code health by 2 | 6.0 |
 | 27 | 0.4.21 |  |  | **Inset the scheduling example's lead text, shift count, alerts and call-to-action by `--pad-x`, like the bars around them.** | 1 | 2 | 1 | 2 | 1 | 9 by 2, 2 by 1 | 4.8 |
 | 20 | 0.4.21 |  |  | **Redirect an anonymous hit on a session-needing flow page to sign-in, instead of a 500.** | 2 | 2 | 2 | 4 | 3 | 2 by 4 | 4.2 |
 | 4 | 0.4.21 |  |  | **Refuse a permission save whose baseline no longer matches Keto, so concurrent edits are not silently lost.** | 2 | 2 | 2 | 4 | 4 | 2 by 4 | 2.8 |
@@ -42,12 +41,6 @@
 
 ## Details
 
-### 30. Give every `oklch()` colour a fallback, so primary buttons stay readable on an engine without it.
-
-The accent, focus and status tokens in `public/css/styles.css` are `oklch()`, which needs Chromium
-111. Below it (Tizen 2024, webOS TV 24) `--accent` is invalid, so `.btn-primary` is white text on
-no background: the sign-in button reads as blank.
-
 ### 29. Show the whole nav tree on an engine without `:has()`, and fold it only where `:has()` works.
 
 README → "Two browser floors": Chromium 87 must reach every page. `public/css/styles.css` hides