diff --git a/ui/src/components/ActivityCharts.tsx b/ui/src/components/ActivityCharts.tsx
index 1463eb0209..d207cf2864 100644
--- a/ui/src/components/ActivityCharts.tsx
+++ b/ui/src/components/ActivityCharts.tsx
@@ -174,13 +174,20 @@ export function PriorityChart({ issues }: { issues: { priority: string; createdA
   );
 }
 
+// DECISION-SHEET.md B5: chart status colors re-pointed at the canonical
+// --status-task-* system (DESIGN.md principle 5 — an operator learns one
+// status vocabulary; badge, row, chart, and log agree). Previously an
+// independent palette (todo blue, in_progress violet, etc.). `backlog`
+// deliberately keeps --project-none (pre-B5, per user ruling); the
+// priority series and success-rate tints below are not status hues and
+// are left alone.
 const statusColors: Record<string, string> = {
-  todo: "var(--hex-3b82f6)",
-  in_progress: "var(--hex-8b5cf6)",
-  in_review: "var(--hex-a855f7)",
-  done: "var(--hex-10b981)",
-  blocked: "var(--hex-ef4444)",
-  cancelled: "var(--hex-6b7280)",
+  todo: "var(--status-task-todo)",
+  in_progress: "var(--status-task-in_progress)",
+  in_review: "var(--status-task-in_review)",
+  done: "var(--status-task-done)",
+  blocked: "var(--status-task-blocked)",
+  cancelled: "var(--status-task-cancelled)",
   backlog: "var(--project-none)",
 };
 
diff --git a/ui/src/index.css b/ui/src/index.css
index 513b04a63f..277b654292 100644
--- a/ui/src/index.css
+++ b/ui/src/index.css
@@ -1455,14 +1455,11 @@ span.paperclip-mention-chip[data-mention-kind="external-object"] {
   --hex-facc15: #facc15; /* OrgChart.tsx agent status dot — 'paused' / 'idle' (shared value). */
   --hex-f87171: #f87171; /* OrgChart.tsx agent status dot — 'error'. */
   --hex-a3a3a3: #a3a3a3; /* OrgChart.tsx agent status dot — 'terminated' + defaultDotColor fallback. */
-  --hex-ef4444: #ef4444; /* ActivityCharts.tsx — priority 'critical' + status 'blocked' (shared value); also the <0.5 success-rate bar tint. */
+  --hex-ef4444: #ef4444; /* ActivityCharts.tsx — priority 'critical'; also the <0.5 success-rate bar tint. (Chart STATUS hues re-pointed at --status-task-* in DECISION-SHEET.md B5; priority/success series stay independent.) */
   --hex-f97316: #f97316; /* ActivityCharts.tsx — priority 'high'. */
   --hex-eab308: #eab308; /* ActivityCharts.tsx — priority 'medium'; also the 0.5-0.8 success-rate bar tint. */
-  --hex-6b7280: #6b7280; /* ActivityCharts.tsx — priority 'low' + status 'cancelled' + statusColors fallback (shared value). */
-  --hex-3b82f6: #3b82f6; /* ActivityCharts.tsx — status 'todo' (independent from --status-task-todo which is #f59e0b). */
-  --hex-8b5cf6: #8b5cf6; /* ActivityCharts.tsx — status 'in_progress' (independent from --status-task-in_progress which is #2563eb — flagged inconsistency, TOKEN-AUDIT.md 1.2). */
-  --hex-a855f7: #a855f7; /* ActivityCharts.tsx — status 'in_review'. */
-  --hex-10b981: #10b981; /* ActivityCharts.tsx — status 'done'; also the >=0.8 success-rate bar tint. */
+  --hex-6b7280: #6b7280; /* ActivityCharts.tsx — priority 'low' + unknown-status statusColors fallback. */
+  --hex-10b981: #10b981; /* ActivityCharts.tsx — >=0.8 success-rate bar tint. */
   --project-none: #64748b; /* Semantic rename of --hex-64748b (DECISION-SHEET.md A3, value unchanged). 'No project assigned' muted-slate fallback (TOKEN-AUDIT.md 1.3) across Routines/MarkdownEditor/RoutineRunVariablesDialog/RoutineList/IssueColumns/editable-sections; also ActivityCharts.tsx status 'backlog'. */
   --project-seed: #6366f1; /* Semantic rename of --hex-6366f1 (DECISION-SHEET.md A3, value unchanged). Project-color-fallback indigo seed default (ProjectDetail/PipelineSettings/IssueProperties/NewIssueDialog) — new-project-color-picker-seed family per TOKEN-AUDIT.md 1.3. */
   --liveness-blue: #2563eb; /* DECISION-SHEET.md A6: IssueChatThread.tsx human-message 'liveness blue' bubble (PAP-95 rev 5). Same value as --status-task-in_progress by coincidence, decoupled on purpose so a future status-hue change doesn't drag the chat bubble along. */