diff --git a/CHANGELOG.md b/CHANGELOG.md
index 439fd56f6..a3e84657f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Added Widget._refresh_scroll to avoid expensive layout when scrolling https://github.com/Textualize/textual/pull/1524
 - `events.Paste` now bubbles https://github.com/Textualize/textual/issues/1434
 - Improved error message when style flag `none` is mixed with other flags (e.g., when setting `text-style`) https://github.com/Textualize/textual/issues/1420
+- Clock color in the `Header` widget now matches the header color https://github.com/Textualize/textual/issues/1459
 
 ### Fixed
 
diff --git a/src/textual/cli/tools/diagnose.py b/src/textual/cli/tools/diagnose.py
index 447d21f95..4b6803a05 100644
--- a/src/textual/cli/tools/diagnose.py
+++ b/src/textual/cli/tools/diagnose.py
@@ -3,8 +3,10 @@
 import os
 import sys
 import platform
+from typing import Any
+from functools import singledispatch
 from importlib_metadata import version
-from rich.console import Console
+from rich.console import Console, ConsoleDimensions
 
 
 def _section(title: str, values: dict[str, str]) -> None:
@@ -55,7 +57,11 @@ def _os() -> None:
 
 
 def _guess_term() -> str:
-    """Try and guess which terminal is being used."""
+    """Try and guess which terminal is being used.
+
+    Returns:
+        str: The best guess at the name of the terminal.
+    """
 
     # First obvious place to look is in $TERM_PROGRAM.
     term_program = os.environ.get("TERM_PROGRAM")
@@ -111,11 +117,29 @@ def _term() -> None:
     )
 
 
+@singledispatch
+def _str_rich(value: Any) -> str:
+    """Convert a rich console option to a string.
+
+    Args:
+        value (Any): The value to convert to a string.
+
+    Returns:
+        str: The string version of the value for output
+    """
+    return str(value)
+
+
+@_str_rich.register
+def _(value: ConsoleDimensions) -> str:
+    return f"width={value.width}, height={value.height}"
+
+
 def _console() -> None:
     """Print The Rich console options."""
     _section(
         "Rich Console options",
-        {k: str(v) for k, v in Console().options.__dict__.items()},
+        {k: _str_rich(v) for k, v in Console().options.__dict__.items()},
     )
 
 
diff --git a/src/textual/widgets/_header.py b/src/textual/widgets/_header.py
index 66e4d4fe0..197601481 100644
--- a/src/textual/widgets/_header.py
+++ b/src/textual/widgets/_header.py
@@ -45,7 +45,7 @@ class HeaderClock(HeaderClockSpace):
 
     DEFAULT_CSS = """
     HeaderClock {
-        background: $secondary-background-lighten-1;
+        background: $foreground-darken-1 5%;
         color: $text;
         text-opacity: 85%;
         content-align: center middle;
@@ -97,7 +97,7 @@ class Header(Widget):
     }
     Header.-tall {
         height: 3;
-    }    
+    }
     """
 
     tall = Reactive(False)