diff --git a/NFC-Payload-Layout.md b/NFC-Payload-Layout.md
index 6ad4859..520e5fc 100644
--- a/NFC-Payload-Layout.md
+++ b/NFC-Payload-Layout.md
@@ -40,6 +40,7 @@ flowchart LR
 
 - 38x38px
 - 8 color palettes x 16 colors
+- Color palette is defined by the creature's type.
 - Pixel encoding?
 
 ## "Official" documentation