diff --git a/README.md b/README.md
index 8897a8f..7a82dfb 100644
--- a/README.md
+++ b/README.md
@@ -89,6 +89,7 @@ And note that:
 - `gray` is for selected color
 - `yellow` is for label color
 - `orange` is for KeyMap menu color
+- `purple` is for button pressed color
 
 See the example in [theme.yaml](example/theme.yaml) file. This file should located at `$XDG_CONFIG_HOME/gtt/theme.yaml` or `$HOME/.config/gtt/theme.yaml`
 
diff --git a/example/theme.yaml b/example/theme.yaml
index 154c394..9f08bde 100644
--- a/example/theme.yaml
+++ b/example/theme.yaml
@@ -6,6 +6,7 @@
 # gray is for selected color
 # yellow is for label color
 # orange is for KeyMap menu color
+# purple is for button pressed color
 tokyonight:
   bg: 0x1a1b26
   fg: 0xc0caf5