diff --git a/Util.cpp b/Util.cpp
index 41356ba..c696228 100644
--- a/Util.cpp
+++ b/Util.cpp
@@ -14,3 +14,12 @@ unsigned long millis_since(unsigned long timestamp)
     return millis() - timestamp;
   }
 }
+
+unsigned int rgb_to_colour(unsigned long colour)
+{
+  return M5.Lcd.color565(
+    (colour >> 16) & 0xFF,
+    (colour >> 8) & 0xFF,
+    (colour) & 0xFF
+    );
+}
diff --git a/Util.h b/Util.h
index 77ceed9..4320dfb 100644
--- a/Util.h
+++ b/Util.h
@@ -1,2 +1,3 @@
 
 unsigned long millis_since(unsigned long timestamp);
+unsigned int rgb_to_colour(unsigned long colour);