diff --git a/subjects/rgb_match/README.md b/subjects/rgb_match/README.md
index 7fba96376..fdb51e52e 100644
--- a/subjects/rgb_match/README.md
+++ b/subjects/rgb_match/README.md
@@ -7,6 +7,7 @@ Implement the struct `Color` with the associated function `swap`. This function
 ### Expected functions
 
 ```rust
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Color {
     pub r: u8,
     pub g: u8,