diff --git a/codex_retry_gateway_tui.py b/codex_retry_gateway_tui.py
index f27a6c2..e39f339 100644
--- a/codex_retry_gateway_tui.py
+++ b/codex_retry_gateway_tui.py
@@ -5,6 +5,7 @@ from __future__ import annotations
 import argparse
 import datetime as dt
 from concurrent.futures import ThreadPoolExecutor
+import hashlib
 import importlib.metadata
 import json
 import os
@@ -81,6 +82,19 @@ REQUEST_TABLE_COLUMN_KEY_SET = set(REQUEST_TABLE_COLUMN_KEYS)
 REQUEST_TABLE_CELL_INDEX = {key: index for index, key in enumerate(REQUEST_TABLE_COLUMN_KEYS)}
 DEFAULT_REQUEST_TABLE_VISIBLE_COLUMNS = REQUEST_TABLE_COLUMN_KEYS
 DEFAULT_REQUEST_TABLE_SORT_COLUMN = "seq"
+THREAD_COLOR_PALETTE = (
+    "#5fd7ff",
+    "#87d75f",
+    "#ffaf5f",
+    "#d787ff",
+    "#5fafff",
+    "#ff87d7",
+    "#d7af5f",
+    "#5fd7af",
+    "#af87ff",
+    "#87afd7",
+)
+THREAD_COLOR_COLUMN_KEYS = frozenset({"req_id", "resp_id", "thread"})
 REQUEST_TABLE_WIDTH_PROFILES = {
     "compact": {
         "seq": 7,
@@ -990,6 +1004,37 @@ def request_row_cells(row: dict[str, Any], text_limits: dict[str, int] | None =
     )
 
 
+def request_thread_color(thread_id: Any) -> str | None:
+    text = str(thread_id or "").strip()
+    if not text:
+        return None
+    digest = hashlib.blake2b(text.encode("utf-8"), digest_size=4).digest()
+    color_index = int.from_bytes(digest[:2], "big") % len(THREAD_COLOR_PALETTE)
+    return THREAD_COLOR_PALETTE[color_index]
+
+
+def request_visible_cells(
+    row: dict[str, Any],
+    cells: tuple[Any, ...],
+    visible_column_keys: list[str],
+) -> list[Any]:
+    visible_cells = [cells[REQUEST_TABLE_CELL_INDEX[column_key]] for column_key in visible_column_keys]
+    thread_color = request_thread_color(row.get("thread_id"))
+    if not thread_color:
+        return visible_cells
+    try:
+        from rich.text import Text
+    except ImportError:
+        return visible_cells
+    styled_cells: list[Any] = []
+    for column_key, cell in zip(visible_column_keys, visible_cells):
+        if column_key in THREAD_COLOR_COLUMN_KEYS:
+            styled_cells.append(Text(str(cell), style=f"bold {thread_color}"))
+        else:
+            styled_cells.append(cell)
+    return styled_cells
+
+
 def request_table_column_label(column_key: str) -> str:
     column = REQUEST_TABLE_COLUMN_BY_KEY.get(column_key)
     return str(column["label"]) if column else column_key
@@ -2113,13 +2158,14 @@ def run_textual(
             selected_row_index = table.cursor_row if table.cursor_row is not None and table.cursor_row >= 0 else 0
             selected_row_key = self._selected_request_key()
             text_limits = self._request_text_limits(table)
+            visible_column_keys = self._visible_request_column_keys()
             table.clear()
             self.request_by_key = {}
             for row in self.requests:
                 key = self._request_row_key(row)
                 self.request_by_key[key] = row
                 cells = request_row_cells(row, text_limits)
-                visible_cells = [cells[REQUEST_TABLE_CELL_INDEX[column_key]] for column_key in self._visible_request_column_keys()]
+                visible_cells = request_visible_cells(row, cells, visible_column_keys)
                 table.add_row(*visible_cells, key=key)
             if self.requests:
                 if not self._select_request_row(selected_row_key):
diff --git a/tests/test_payload.py b/tests/test_payload.py
index 2c32543..930dfcf 100644
--- a/tests/test_payload.py
+++ b/tests/test_payload.py
@@ -263,6 +263,51 @@ class CodexRetryGatewayTUITests(unittest.TestCase):
         self.assertIn("current wave round 3 slot 1 first 1.2s", mod.render_request_detail(row))
         self.assertEqual(mod.request_row_cells(row)[20], "3(2)")
 
+    def test_request_visible_cells_colorize_thread_identity_columns(self) -> None:
+        mod = load_module()
+        try:
+            from rich.text import Text
+        except ImportError:
+            self.skipTest("rich is not installed")
+        row = {
+            "seq": 1,
+            "request_id": "req_1",
+            "response_id": "resp_1",
+            "thread_id": "thread_same",
+            "started_at": "2026-06-30T12:00:00Z",
+            "status_code": 200,
+            "path": "/responses",
+            "model": "gpt-5",
+            "requested_model": "",
+            "forwarded_model": "",
+            "reasoning_tokens": 7,
+            "reasoning_effort": "xhigh",
+            "input_tokens": 20,
+            "output_tokens": 10,
+            "cached_tokens": 5,
+            "request_body_bytes": 1536,
+            "response_bytes_received": 4096,
+            "response_stream": True,
+            "stream_chunk_count": 4,
+            "first_response_delay_ms": 1200,
+            "duration_ms": 3400,
+            "upstream_attempt_count": 1,
+            "error": "",
+            "finished_at": "2026-06-30T12:00:03Z",
+        }
+        cells = mod.request_row_cells(row)
+        visible = mod.request_visible_cells(row, cells, ["seq", "req_id", "resp_id", "thread", "status"])
+        self.assertEqual(visible[0], "1")
+        self.assertIsInstance(visible[1], Text)
+        self.assertIsInstance(visible[2], Text)
+        self.assertIsInstance(visible[3], Text)
+        self.assertEqual(visible[1].plain, "req_1")
+        self.assertEqual(visible[2].plain, "resp_1")
+        self.assertEqual(visible[3].plain, "thread_same")
+        self.assertEqual(visible[4], "· 200")
+        self.assertEqual(mod.request_thread_color("thread_same"), mod.request_thread_color("thread_same"))
+        self.assertIsNone(mod.request_thread_color(""))
+
     def test_request_table_preferences_round_trip(self) -> None:
         mod = load_module()
         with tempfile.TemporaryDirectory() as tmpdir: