diff --git a/src/fillname/__main__.py b/src/fillname/__main__.py
index 9523db0..10f5353 100644
--- a/src/fillname/__main__.py
+++ b/src/fillname/__main__.py
@@ -14,7 +14,7 @@ def main() -> None:
     """
     parser = get_parser()
     args = parser.parse_args()
-    configure_logging(sys.stderr, args.log)
+    configure_logging(sys.stderr, args.log, sys.stderr.isatty())
 
     log = get_logger("main")
     log.info("info")
diff --git a/src/fillname/utils/logging.py b/src/fillname/utils/logging.py
index a82eeb8..d18de14 100644
--- a/src/fillname/utils/logging.py
+++ b/src/fillname/utils/logging.py
@@ -45,17 +45,20 @@ def filter(self, record: logging.LogRecord) -> bool:
         return record.levelno == self.passlevel
 
 
-def configure_logging(stream: TextIO, level: int) -> None:
+def configure_logging(stream: TextIO, level: int, use_color: bool) -> None:
     """
     Configure application logging.
     """
-    log_message_str = "{}%(levelname)s:{}  - %(message)s{}"
+    def format_str(color: str) -> str:
+        if use_color:
+            return f"{COLORS[color]}%(levelname)s:{COLORS['GREY']}  - %(message)s{COLORS['NORMAL']}"
+        return "%(levelname)s:  - %(message)s" # nocoverage
 
     def make_handler(level: int, color: str) -> "logging.StreamHandler[TextIO]":
         handler = logging.StreamHandler(stream)
         handler.addFilter(SingleLevelFilter(level, False))
         handler.setLevel(level)
-        formatter = logging.Formatter(log_message_str.format(COLORS[color], COLORS["GREY"], COLORS["NORMAL"]))
+        formatter = logging.Formatter(format_str(color))
         handler.setFormatter(formatter)
         return handler
 
diff --git a/tests/test_main.py b/tests/test_main.py
index 38d40dd..26f1aac 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -20,7 +20,7 @@ def test_logger(self) -> None:
         Test the logger.
         """
         sio = StringIO()
-        configure_logging(sio, logging.INFO)
+        configure_logging(sio, logging.INFO, True)
         log = get_logger("main")
         log.info("test123")
         self.assertRegex(sio.getvalue(), "test123")