diff --git a/understand-anything-plugin/packages/dashboard/src/components/ThemePicker.tsx b/understand-anything-plugin/packages/dashboard/src/components/ThemePicker.tsx
new file mode 100644
index 0000000..525e37d
--- /dev/null
+++ b/understand-anything-plugin/packages/dashboard/src/components/ThemePicker.tsx
@@ -0,0 +1,143 @@
+import { useCallback, useEffect, useRef, useState } from "react";
+import { useTheme, PRESETS } from "../themes/index.ts";
+
+export function ThemePicker() {
+  const { config, preset, setPreset, setAccent } = useTheme();
+  const [open, setOpen] = useState(false);
+  const ref = useRef<HTMLDivElement>(null);
+
+  // Close on outside click
+  useEffect(() => {
+    if (!open) return;
+    function handleClick(e: MouseEvent) {
+      if (ref.current && !ref.current.contains(e.target as Node)) {
+        setOpen(false);
+      }
+    }
+    document.addEventListener("mousedown", handleClick);
+    return () => document.removeEventListener("mousedown", handleClick);
+  }, [open]);
+
+  // Close on Escape
+  useEffect(() => {
+    if (!open) return;
+    function handleKey(e: KeyboardEvent) {
+      if (e.key === "Escape") setOpen(false);
+    }
+    document.addEventListener("keydown", handleKey);
+    return () => document.removeEventListener("keydown", handleKey);
+  }, [open]);
+
+  const handlePreset = useCallback(
+    (id: string) => {
+      setPreset(id as Parameters<typeof setPreset>[0]);
+    },
+    [setPreset],
+  );
+
+  return (
+    <div ref={ref} className="relative">
+      <button
+        onClick={() => setOpen((v) => !v)}
+        className="flex items-center gap-1.5 px-2 py-1 rounded text-xs text-text-secondary hover:text-text-primary transition-colors"
+        title="Change theme"
+      >
+        <svg
+          width="14"
+          height="14"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          strokeWidth="2"
+          strokeLinecap="round"
+          strokeLinejoin="round"
+        >
+          <circle cx="12" cy="12" r="10" />
+          <path d="M12 2a7 7 0 0 0 0 14 4 4 0 0 1 0 8 10 10 0 0 0 0-20z" />
+          <circle cx="8" cy="10" r="1.5" fill="currentColor" />
+          <circle cx="12" cy="7" r="1.5" fill="currentColor" />
+          <circle cx="16" cy="10" r="1.5" fill="currentColor" />
+        </svg>
+        <span className="hidden sm:inline">Theme</span>
+      </button>
+
+      {open && (
+        <div className="absolute right-0 top-full mt-2 w-64 rounded-lg glass-heavy shadow-xl z-50 p-3 space-y-3">
+          {/* Presets */}
+          <div>
+            <div className="text-[10px] font-semibold text-text-muted uppercase tracking-wider mb-2">
+              Theme
+            </div>
+            <div className="space-y-1">
+              {PRESETS.map((p) => (
+                <button
+                  key={p.id}
+                  onClick={() => handlePreset(p.id)}
+                  className={`w-full flex items-center gap-2.5 px-2.5 py-1.5 rounded text-xs transition-colors ${
+                    p.id === config.presetId
+                      ? "bg-accent/15 text-accent"
+                      : "text-text-secondary hover:text-text-primary hover:bg-elevated"
+                  }`}
+                >
+                  {/* Color preview dots */}
+                  <div className="flex gap-1">
+                    <span
+                      className="w-3 h-3 rounded-full border border-border-subtle"
+                      style={{ backgroundColor: p.colors.root }}
+                    />
+                    <span
+                      className="w-3 h-3 rounded-full border border-border-subtle"
+                      style={{ backgroundColor: p.colors.surface }}
+                    />
+                    <span
+                      className="w-3 h-3 rounded-full border border-border-subtle"
+                      style={{
+                        backgroundColor:
+                          p.accentSwatches.find((s) => s.id === p.defaultAccentId)?.accent ??
+                          p.accentSwatches[0].accent,
+                      }}
+                    />
+                  </div>
+                  <span>{p.name}</span>
+                  {p.id === config.presetId && (
+                    <svg
+                      className="ml-auto w-3.5 h-3.5 text-accent"
+                      viewBox="0 0 24 24"
+                      fill="none"
+                      stroke="currentColor"
+                      strokeWidth="3"
+                    >
+                      <polyline points="20 6 9 17 4 12" />
+                    </svg>
+                  )}
+                </button>
+              ))}
+            </div>
+          </div>
+
+          {/* Accent swatches */}
+          <div>
+            <div className="text-[10px] font-semibold text-text-muted uppercase tracking-wider mb-2">
+              Accent Color
+            </div>
+            <div className="flex gap-2 flex-wrap">
+              {preset.accentSwatches.map((swatch) => (
+                <button
+                  key={swatch.id}
+                  onClick={() => setAccent(swatch.id)}
+                  className={`w-6 h-6 rounded-full transition-transform hover:scale-110 ${
+                    swatch.id === config.accentId
+                      ? "ring-2 ring-text-primary ring-offset-1 ring-offset-root"
+                      : ""
+                  }`}
+                  style={{ backgroundColor: swatch.accent }}
+                  title={swatch.name}
+                />
+              ))}
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}