diff --git a/clock.py b/clock.py
index 22225ac..d2ba65a 100644
--- a/clock.py
+++ b/clock.py
@@ -5,7 +5,7 @@
 from timezones import TIMEZONE_DICT
 
 # 定数
-BG_COLOR = "#FFA500"
+BG_COLOR = "#800080"
 TEXT_COLOR = "#333333"
 NOTATION_12_HOUR = "12時制"
 NOTATION_24_HOUR = "24時制"
diff --git a/sample.txt b/sample.txt
new file mode 100644
index 0000000..e69de29