diff --git a/2023-DFES/data/colours.csv b/2023-DFES/data/colours.csv
index 9ee8ec0..e667f1d 100644
--- a/2023-DFES/data/colours.csv
+++ b/2023-DFES/data/colours.csv
@@ -8,6 +8,7 @@ Natural gas,#B8BFF9
 Hydrogen,#0279FA
 Bioenergy,#019303
 Petrol,#FFC300
+Petroleum,#FFC300
 Solid fuel,#505050
 Diesel,#846F3F
 Wind,#2780E7
@@ -18,4 +19,4 @@ Other,#80604E
 Electric HGVs,#FF9966
 Electric Buses,#466228
 Electrolysers,#4BACC6
-Large industry Fuel Switching,#808080
\ No newline at end of file
+Large industry Fuel Switching,#808080