diff --git a/README.md b/README.md
index 438bf0c..2ab336e 100644
--- a/README.md
+++ b/README.md
@@ -269,9 +269,13 @@ in three kinds:
   date) and one group per `recent` widget (newest first) - each group is a header
   (title, refresh stamp, per-widget errors) followed by one card per release,
   laid out as a wrapping grid - then notices, urgent first, then heads-up then
-  info, each group in creation order. The next upcoming release that carries
-  artwork also gets a full-width hero tile above the groups (its relayed thumb
-  plus title and date). Each widget gets its own sidebar button for a
+  info, each group in creation order. Cards are tinted by the app that produced
+  them (Sonarr teal, Radarr violet, Plex orange - separate light/dark shades of
+  each), on the card edge, the source chip, and a legend chip per origin in the
+  group header, so a merged timeline says which app each card came from. The
+  next upcoming release that carries artwork also gets a full-width hero tile
+  above the groups (its relayed thumb plus title and date), ringed in the same
+  origin hue. Each widget gets its own sidebar button for a
   single-widget view.
 - Writes are admin-only when OIDC is on, reads any session - same gate as
   services.
diff --git a/src/uwudash_mk3/static/app.js b/src/uwudash_mk3/static/app.js
index 2e33d9e..b3d4a8b 100644
--- a/src/uwudash_mk3/static/app.js
+++ b/src/uwudash_mk3/static/app.js
@@ -233,12 +233,20 @@ function noticeCard(widget) {
   );
 }
 
+// Cards are tinted by the app that produced them, so a merged timeline reads by
+// source at a glance; an unknown origin stays neutral.
+const ORIGIN_LABEL = { sonarr: "Sonarr", radarr: "Radarr", plex: "Plex" };
+
+function originClass(item) {
+  return ORIGIN_LABEL[item ? item.origin : null] ? ` origin-${item.origin}` : "";
+}
+
 function releaseCard(item) {
   const thumb = item.thumb
     ? `<img class="widget-thumb" src="${esc(item.thumb)}" alt="${esc(item.label)}" loading="lazy" />`
     : "";
   return (
-    `<div class="release-card">` +
+    `<div class="release-card${originClass(item)}">` +
     thumb +
     `<span class="widget-label">${esc(item.label)}</span>` +
     (item.sub ? `<span class="widget-sub">${esc(item.sub)}</span>` : "") +
@@ -286,12 +294,17 @@ function liveCard(widgets, title, ascending) {
   const refreshed = widgets.map((widget) => (widget.data || {}).fetched_at || "").filter(Boolean);
   const stamp = refreshed.length ? `refreshed ${clockOf(refreshed.sort()[0])}` : "";
   const meta = [...notes, stamp].filter(Boolean).join(" · ");
+  const legend = Object.keys(ORIGIN_LABEL)
+    .filter((key) => rows.some((row) => row.origin === key))
+    .map((key) => `<span class="origin-key origin-${key}">${ORIGIN_LABEL[key]}</span>`)
+    .join("");
   return (
     `<div class="live-group">` +
     `<div class="live-head">` +
     `<span class="icon">${widgetIcon(widgets[0])}</span>` +
     `<div class="widget-title">${esc(title)}</div>` +
     `<div class="widget-meta">${esc(meta)}</div>` +
+    (legend ? `<div class="widget-keys">${legend}</div>` : "") +
     `</div>` +
     (rows.length ? `<div class="release-cards">${rows.map(releaseCard).join("")}</div>` : "") +
     (rows.length ? "" : `<div class="widget-empty">${esc(meta || "nothing in the window")}</div>`) +
@@ -324,7 +337,7 @@ function heroTile(widgets) {
     .sort((a, b) => (a.date < b.date ? -1 : 1));
   const next = upcoming.length ? upcoming[0] : thumbnailed[0];
   return (
-    `<div class="home-hero">` +
+    `<div class="home-hero${originClass(next)}">` +
     `<img class="home-hero-img" src="${esc(next.thumb)}" alt="${esc(next.label)}" loading="lazy" />` +
     `<div class="home-hero-cap">` +
     `<span class="home-hero-title">${esc(next.label)}</span>` +
diff --git a/src/uwudash_mk3/static/styles.css b/src/uwudash_mk3/static/styles.css
index f5e93bb..b216383 100644
--- a/src/uwudash_mk3/static/styles.css
+++ b/src/uwudash_mk3/static/styles.css
@@ -9,6 +9,10 @@
   --success: #3fbf7f;
   --error: #e0556b;
   --warning: #d9a441;
+  /* release cards are tinted by the app that produced them */
+  --origin-sonarr: #45c8c2;
+  --origin-radarr: #a97ce8;
+  --origin-plex: #f2813f;
 }
 
 @media (prefers-color-scheme: light) {
@@ -20,6 +24,9 @@
     --fg: #16202e;
     --muted: #61708a;
     --accent: #2f6fd0;
+    --origin-sonarr: #127c78;
+    --origin-radarr: #6b3fa8;
+    --origin-plex: #b3541f;
   }
 }
 
@@ -363,6 +370,31 @@ body {
 .release-card .widget-sub { color: var(--muted); font-size: 12px; }
 .release-card .widget-when { font-size: 12px; font-weight: 700; color: var(--muted); }
 .release-card .widget-src { font-size: 11px; color: var(--accent); }
+
+/* origin tints: Sonarr teal, Radarr violet, Plex orange. The merged timeline
+   mixes apps, so the card edge, the source chip and a legend chip in the group
+   header all carry the same hue. */
+.release-card.origin-sonarr { border-left: 3px solid var(--origin-sonarr); }
+.release-card.origin-radarr { border-left: 3px solid var(--origin-radarr); }
+.release-card.origin-plex { border-left: 3px solid var(--origin-plex); }
+.release-card.origin-sonarr .widget-src { color: var(--origin-sonarr); }
+.release-card.origin-radarr .widget-src { color: var(--origin-radarr); }
+.release-card.origin-plex .widget-src { color: var(--origin-plex); }
+.live-head .widget-keys { display: flex; flex-wrap: wrap; gap: 8px; }
+.origin-key {
+  font-size: 11px;
+  font-weight: 600;
+  padding: 1px 7px;
+  border-radius: 999px;
+  border: 1px solid currentColor;
+  color: var(--muted);
+}
+.origin-key.origin-sonarr { color: var(--origin-sonarr); }
+.origin-key.origin-radarr { color: var(--origin-radarr); }
+.origin-key.origin-plex { color: var(--origin-plex); }
+.home-hero.origin-sonarr { border: 2px solid var(--origin-sonarr); }
+.home-hero.origin-radarr { border: 2px solid var(--origin-radarr); }
+.home-hero.origin-plex { border: 2px solid var(--origin-plex); }
 .widget-empty { color: var(--muted); font-size: 13px; }
 
 .home-empty { color: var(--muted); font-size: 14px; }
diff --git a/src/uwudash_mk3/widgets.py b/src/uwudash_mk3/widgets.py
index 48cf329..b31e11c 100644
--- a/src/uwudash_mk3/widgets.py
+++ b/src/uwudash_mk3/widgets.py
@@ -275,6 +275,7 @@ class WidgetData:
                         "label": show or episode_title or "?",
                         "sub": " · ".join(bits),
                         "type": "episode",
+                        "origin": "sonarr",
                         "source": widget.name,
                         "thumb": None,
                     }
@@ -299,6 +300,7 @@ class WidgetData:
                     "label": label,
                     "sub": RADARR_DATE_LABELS.get(field, ""),
                     "type": "movie",
+                    "origin": "radarr",
                     "source": widget.name,
                     "thumb": self._thumb(widget, self._radarr_image(item)),
                 }
@@ -333,6 +335,7 @@ class WidgetData:
                     "label": str(item.get("title") or "?"),
                     "sub": " · ".join(bits),
                     "type": str(item.get("type") or "added"),
+                    "origin": "plex",
                     "source": widget.name,
                     "thumb": self._thumb(widget, item.get("thumb")),
                 }