diff --git a/ui/src/index.css b/ui/src/index.css
index 86280ca..2d76230 100644
--- a/ui/src/index.css
+++ b/ui/src/index.css
@@ -13,17 +13,20 @@
   --accent-text: #1d4ed8;
 }
 
+/* Dark palette tuned to Perspective's "Pro Dark" theme:
+   bg #242526, tooltip #2a2c2f, gridline #3b3f46, inactive #61656e,
+   inactive border #4c505b, active #2770a9, legend #c5c9d0. */
 .dark {
-  --bg-primary: #111827;
-  --bg-secondary: #1f2937;
-  --bg-tertiary: #374151;
-  --text-primary: #f9fafb;
-  --text-secondary: #e5e7eb;
-  --text-muted: #6b7280;
-  --border-color: #374151;
-  --border-light: #1f2937;
-  --accent-bg: #1e3a5f;
-  --accent-text: #60a5fa;
+  --bg-primary: #242526;
+  --bg-secondary: #2a2c2f;
+  --bg-tertiary: #3b3f46;
+  --text-primary: #ffffff;
+  --text-secondary: #c5c9d0;
+  --text-muted: #61656e;
+  --border-color: #4c505b;
+  --border-light: #3b3f46;
+  --accent-bg: rgba(39, 113, 170, 0.32);
+  --accent-text: #4778c2;
 }
 
 body { margin: 0; background-color: var(--bg-primary); color: var(--text-primary); }
@@ -47,19 +50,29 @@ body { margin: 0; background-color: var(--bg-primary); color: var(--text-primary
 .dark .text-blue-700 { color: var(--accent-text); }
 .dark .border-blue-300 { border-color: var(--accent-text); }
 .dark .hover\:bg-blue-50:hover { background-color: var(--accent-bg); }
-.dark .bg-green-50 { background-color: #064e3b; }
-.dark .text-green-600 { color: #34d399; }
-.dark .text-green-700 { color: #34d399; }
-.dark .text-green-400 { color: #34d399; }
-.dark .bg-yellow-50 { background-color: #451a03; }
-.dark .text-yellow-700 { color: #fbbf24; }
-.dark .bg-purple-50 { background-color: #1e1b4b; }
-.dark .text-purple-700 { color: #a78bfa; }
-.dark .bg-red-50 { background-color: #450a0a; }
-.dark .text-red-700 { color: #f87171; }
+
+/* Status accents — desaturated to sit on Pro Dark's neutral background */
+.dark .bg-green-50 { background-color: #1a3d2c; }
+.dark .text-green-600 { color: #6ee7b7; }
+.dark .text-green-700 { color: #6ee7b7; }
+.dark .text-green-400 { color: #6ee7b7; }
+.dark .bg-yellow-50 { background-color: #3a2e14; }
+.dark .text-yellow-700 { color: #f5c66f; }
+.dark .bg-amber-50 { background-color: #3a2e14; }
+.dark .border-amber-200 { border-color: #5a4a26; }
+.dark .text-amber-700 { color: #f5c66f; }
+.dark .text-amber-800 { color: #f5c66f; }
+.dark .bg-purple-50 { background-color: #2a1f3d; }
+.dark .text-purple-600 { color: #c4a8e8; }
+.dark .text-purple-700 { color: #c4a8e8; }
+.dark .bg-red-50 { background-color: #3d1f1f; }
+.dark .text-red-600 { color: #ff9485; }
+.dark .text-red-700 { color: #ff9485; }
+
 .dark .border-gray-100 { border-color: var(--border-light); }
 .dark .border-gray-200 { border-color: var(--border-color); }
 .dark .border-gray-300 { border-color: var(--border-color); }
+.dark .border-blue-100 { border-color: var(--border-color); }
 .dark .border-b { border-color: var(--border-color); }
 .dark .border-t { border-color: var(--border-color); }
 .dark .border-r { border-color: var(--border-color); }
@@ -73,8 +86,8 @@ body { margin: 0; background-color: var(--bg-primary); color: var(--text-primary
 .dark .hover\:border-gray-300:hover { border-color: var(--border-color); }
 .dark .hover\:border-gray-400:hover { border-color: var(--border-color); }
 .dark .focus\:border-gray-300:focus { border-color: var(--border-color); }
-.dark ::selection { background-color: var(--accent-bg); color: var(--accent-text); }
-.dark input { background-color: var(--bg-secondary); color: var(--text-primary); }
-.dark select { background-color: var(--bg-secondary); color: var(--text-primary); }
-.dark textarea { background-color: var(--bg-secondary); color: var(--text-primary); }
+.dark ::selection { background-color: var(--accent-bg); color: var(--text-primary); }
+.dark input { background-color: var(--bg-secondary); color: var(--text-primary); border-color: var(--border-color); }
+.dark select { background-color: var(--bg-secondary); color: var(--text-primary); border-color: var(--border-color); }
+.dark textarea { background-color: var(--bg-secondary); color: var(--text-primary); border-color: var(--border-color); }
 .dark .bg-transparent { background-color: transparent; }
diff --git a/ui/src/views/Forecast.jsx b/ui/src/views/Forecast.jsx
index e9f649f..3017291 100644
--- a/ui/src/views/Forecast.jsx
+++ b/ui/src/views/Forecast.jsx
@@ -1,4 +1,5 @@
 import { useState, useEffect, useRef } from 'react'
+import useTheme from '../theme.jsx'
 
 const LAYOUT_KEY  = (vid) => `pf_layout_v${vid}`   // last-used layout (auto restore)
 const LAYOUTS_KEY = (vid) => `pf_layouts_v${vid}`  // named layout list
@@ -29,6 +30,7 @@ function cleanLayout(cfg, validCols) {
 }
 
 export default function Forecast() {
+  const { dark } = useTheme()
   const [sources,  setSources]  = useState([])
   const [sourceId, setSourceId] = useState('')
   const [versions, setVersions] = useState([])
@@ -105,6 +107,12 @@ export default function Forecast() {
     initViewer(versionId, sourceId)
   }, [versionId, sourceId])
 
+  useEffect(() => {
+    if (viewerRef.current) {
+      viewerRef.current.setAttribute('theme', dark ? 'Pro Dark' : 'Pro Light')
+    }
+  }, [dark, versionId])
+
   useEffect(() => {
     const blank = Object.fromEntries(Object.keys(slice).map(k => [k, '']))
     setRecodeSet(blank)
@@ -196,6 +204,7 @@ export default function Forecast() {
         : await worker.table([], { name: tableName, index: 'pf_id' })
 
       await viewer.load(worker)
+      viewer.setAttribute('theme', dark ? 'Pro Dark' : 'Pro Light')
 
       // restore last-used layout or build default
       const saved = localStorage.getItem(LAYOUT_KEY(vid))