diff --git a/README.md b/README.md
index d2a224c..c38a133 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,8 @@ Setup the following environment variables:
   - Loop will increment the hue value through the spectrum and loop.
 - `TWITCH_BOT_INTERVAL`
   - Time between color changes in seconds. Default 10 seconds.
+- `TWITCH_BOT_DEFAULT_COLOR`
+  - Default username color that is used initially and set on program exit. Default is #F1C40F.
 
 ## Running locally