diff --git a/src/openrct2-ui/windows/Ride.cpp b/src/openrct2-ui/windows/Ride.cpp
index 235dbcf2ca..a7c4a112f7 100644
--- a/src/openrct2-ui/windows/Ride.cpp
+++ b/src/openrct2-ui/windows/Ride.cpp
@@ -188,7 +188,7 @@ enum {
     WIDX_VEHICLE_COLOUR_INDEX_DROPDOWN,
     WIDX_VEHICLE_BODY_COLOUR,
     WIDX_VEHICLE_TRIM_COLOUR,
-    WIDX_VEHICLE_TERNARY_COLOUR,
+    WIDX_VEHICLE_TERTIARY_COLOUR,
     WIDX_SELL_ITEM_RANDOM_COLOUR_CHECKBOX,
 
     WIDX_PLAY_MUSIC = 14,
@@ -4277,7 +4277,7 @@ static_assert(std::size(RatingNames) == 6);
                     vehicleColour = RideGetVehicleColour(*ride, _vehicleIndex);
                     WindowDropdownShowColour(this, &widgets[widgetIndex], colours[1], vehicleColour.Trim);
                     break;
-                case WIDX_VEHICLE_TERNARY_COLOUR:
+                case WIDX_VEHICLE_TERTIARY_COLOUR:
                     vehicleColour = RideGetVehicleColour(*ride, _vehicleIndex);
                     WindowDropdownShowColour(this, &widgets[widgetIndex], colours[1], vehicleColour.Tertiary);
                     break;
@@ -4371,10 +4371,10 @@ static_assert(std::size(RatingNames) == 6);
                     GameActions::Execute(&rideSetAppearanceAction);
                 }
                 break;
-                case WIDX_VEHICLE_TERNARY_COLOUR:
+                case WIDX_VEHICLE_TERTIARY_COLOUR:
                 {
                     auto rideSetAppearanceAction = RideSetAppearanceAction(
-                        rideId, RideSetAppearanceType::VehicleColourTernary, ColourDropDownIndexToColour(dropdownIndex),
+                        rideId, RideSetAppearanceType::VehicleColourTertiary, ColourDropDownIndexToColour(dropdownIndex),
                         _vehicleIndex);
                     GameActions::Execute(&rideSetAppearanceAction);
                 }
@@ -4557,7 +4557,7 @@ static_assert(std::size(RatingNames) == 6);
                 widgets[WIDX_VEHICLE_BODY_COLOUR].image = GetColourButtonImage(vehicleColour.Body);
 
                 bool allowChangingTrimColour = false;
-                bool allowChangingTernaryColour = false;
+                bool allowChangingTertiaryColour = false;
 
                 for (int32_t i = 0; i < ride->num_cars_per_train; i++)
                 {
@@ -4567,9 +4567,9 @@ static_assert(std::size(RatingNames) == 6);
                     {
                         allowChangingTrimColour = true;
                     }
-                    if (rideEntry->Cars[vehicleTypeIndex].flags & CAR_ENTRY_FLAG_ENABLE_TERNARY_COLOUR)
+                    if (rideEntry->Cars[vehicleTypeIndex].flags & CAR_ENTRY_FLAG_ENABLE_TERTIARY_COLOUR)
                     {
-                        allowChangingTernaryColour = true;
+                        allowChangingTertiaryColour = true;
                     }
                 }
 
@@ -4578,20 +4578,20 @@ static_assert(std::size(RatingNames) == 6);
                 {
                     widgets[WIDX_VEHICLE_TRIM_COLOUR].type = WindowWidgetType::ColourBtn;
                     widgets[WIDX_VEHICLE_TRIM_COLOUR].image = GetColourButtonImage(vehicleColour.Trim);
-                    if (allowChangingTernaryColour)
+                    if (allowChangingTertiaryColour)
                     {
-                        widgets[WIDX_VEHICLE_TERNARY_COLOUR].type = WindowWidgetType::ColourBtn;
-                        widgets[WIDX_VEHICLE_TERNARY_COLOUR].image = GetColourButtonImage(vehicleColour.Tertiary);
+                        widgets[WIDX_VEHICLE_TERTIARY_COLOUR].type = WindowWidgetType::ColourBtn;
+                        widgets[WIDX_VEHICLE_TERTIARY_COLOUR].image = GetColourButtonImage(vehicleColour.Tertiary);
                     }
                     else
                     {
-                        widgets[WIDX_VEHICLE_TERNARY_COLOUR].type = WindowWidgetType::Empty;
+                        widgets[WIDX_VEHICLE_TERTIARY_COLOUR].type = WindowWidgetType::Empty;
                     }
                 }
                 else
                 {
                     widgets[WIDX_VEHICLE_TRIM_COLOUR].type = WindowWidgetType::Empty;
-                    widgets[WIDX_VEHICLE_TERNARY_COLOUR].type = WindowWidgetType::Empty;
+                    widgets[WIDX_VEHICLE_TERTIARY_COLOUR].type = WindowWidgetType::Empty;
                 }
 
                 // Vehicle colour scheme type
@@ -4636,7 +4636,7 @@ static_assert(std::size(RatingNames) == 6);
                 widgets[WIDX_VEHICLE_COLOUR_INDEX_DROPDOWN].type = WindowWidgetType::Empty;
                 widgets[WIDX_VEHICLE_BODY_COLOUR].type = WindowWidgetType::Empty;
                 widgets[WIDX_VEHICLE_TRIM_COLOUR].type = WindowWidgetType::Empty;
-                widgets[WIDX_VEHICLE_TERNARY_COLOUR].type = WindowWidgetType::Empty;
+                widgets[WIDX_VEHICLE_TERTIARY_COLOUR].type = WindowWidgetType::Empty;
             }
 
             ft.Rewind();
diff --git a/src/openrct2-ui/windows/Scenery.cpp b/src/openrct2-ui/windows/Scenery.cpp
index d368131297..52591abaca 100644
--- a/src/openrct2-ui/windows/Scenery.cpp
+++ b/src/openrct2-ui/windows/Scenery.cpp
@@ -88,7 +88,7 @@ static Widget WindowSceneryBaseWidgets[] = {
     MakeWidget     ({609,  83}, { 24, 24}, WindowWidgetType::FlatBtn,   WindowColour::Secondary, ImageId(SPR_PAINTBRUSH),      STR_SCENERY_PAINTBRUSH_TIP ), // 4000000   0x009DE438
     MakeWidget     ({615,  108}, { 12, 12}, WindowWidgetType::ColourBtn, WindowColour::Secondary, 0xFFFFFFFF,          STR_SELECT_COLOUR          ), // 8000000   0x009DE448
     MakeWidget     ({615, 120}, { 12, 12}, WindowWidgetType::ColourBtn, WindowColour::Secondary, 0xFFFFFFFF,          STR_SELECT_SECONDARY_COLOUR), // 10000000  0x009DE458
-    MakeWidget     ({615, 132}, { 12, 12}, WindowWidgetType::ColourBtn, WindowColour::Secondary, 0xFFFFFFFF,          STR_SELECT_TERNARY_COLOUR  ), // 20000000  0x009DE468
+    MakeWidget     ({615, 132}, { 12, 12}, WindowWidgetType::ColourBtn, WindowColour::Secondary, 0xFFFFFFFF,          STR_SELECT_TERTIARY_COLOUR  ), // 20000000  0x009DE468
     MakeWidget     ({609, 145}, { 24, 24}, WindowWidgetType::FlatBtn,   WindowColour::Secondary, ImageId(SPR_G2_EYEDROPPER),   STR_SCENERY_EYEDROPPER_TIP ), // 40000000  0x009DE478
     MakeWidget     ({609, 169}, { 24, 24}, WindowWidgetType::FlatBtn,   WindowColour::Secondary, ImageId(SPR_SCENERY_CLUSTER), STR_SCENERY_CLUSTER_TIP    ), // 40000000  0x009DE478
     MakeWidget     ({  4,  46}, {211, 14}, WindowWidgetType::TextBox,   WindowColour::Secondary                          ),
diff --git a/src/openrct2/actions/RideSetAppearanceAction.cpp b/src/openrct2/actions/RideSetAppearanceAction.cpp
index a1405ed462..31ae303b03 100644
--- a/src/openrct2/actions/RideSetAppearanceAction.cpp
+++ b/src/openrct2/actions/RideSetAppearanceAction.cpp
@@ -71,7 +71,7 @@ GameActions::Result RideSetAppearanceAction::Query() const
             break;
         case RideSetAppearanceType::VehicleColourBody:
         case RideSetAppearanceType::VehicleColourTrim:
-        case RideSetAppearanceType::VehicleColourTernary:
+        case RideSetAppearanceType::VehicleColourTertiary:
             if (_index >= std::size(ride->vehicle_colours))
             {
                 LOG_WARNING("Invalid game command, index %d out of bounds", _index);
@@ -123,7 +123,7 @@ GameActions::Result RideSetAppearanceAction::Execute() const
             ride->vehicle_colours[_index].Trim = _value;
             RideUpdateVehicleColours(*ride);
             break;
-        case RideSetAppearanceType::VehicleColourTernary:
+        case RideSetAppearanceType::VehicleColourTertiary:
             ride->vehicle_colours[_index].Tertiary = _value;
             RideUpdateVehicleColours(*ride);
             break;
diff --git a/src/openrct2/actions/RideSetAppearanceAction.h b/src/openrct2/actions/RideSetAppearanceAction.h
index 6b0cb594ce..0b9fcbcef7 100644
--- a/src/openrct2/actions/RideSetAppearanceAction.h
+++ b/src/openrct2/actions/RideSetAppearanceAction.h
@@ -19,7 +19,7 @@ enum class RideSetAppearanceType : uint8_t
     MazeStyle = TrackColourSupports,
     VehicleColourBody,
     VehicleColourTrim,
-    VehicleColourTernary,
+    VehicleColourTertiary,
     VehicleColourScheme,
     EntranceStyle,
     SellingItemColourIsRandom
diff --git a/src/openrct2/localisation/StringIds.h b/src/openrct2/localisation/StringIds.h
index 53d6e6d344..248d4765a6 100644
--- a/src/openrct2/localisation/StringIds.h
+++ b/src/openrct2/localisation/StringIds.h
@@ -2286,7 +2286,7 @@ enum : uint16_t
     // STR_3098    :Can't change lift hill speed...
     STR_SELECT_COLOUR = 3099,
     STR_SELECT_SECONDARY_COLOUR = 3100,
-    STR_SELECT_TERNARY_COLOUR = 3101,
+    STR_SELECT_TERTIARY_COLOUR = 3101,
     STR_SCENERY_PAINTBRUSH_TIP = 3102,
     STR_CANT_REPAINT_THIS = 3103,
     STR_LIST_RIDES_TIP = 3104,
diff --git a/src/openrct2/object/RideObject.cpp b/src/openrct2/object/RideObject.cpp
index 152e3a3f55..f5ce445d68 100644
--- a/src/openrct2/object/RideObject.cpp
+++ b/src/openrct2/object/RideObject.cpp
@@ -818,7 +818,7 @@ CarEntry RideObject::ReadJsonCar([[maybe_unused]] IReadObjectContext* context, j
             { "isReverserPassengerCar", CAR_ENTRY_FLAG_REVERSER_PASSENGER_CAR },
             { "hasInvertedSpriteSet", CAR_ENTRY_FLAG_HAS_INVERTED_SPRITE_SET },
             { "hasDodgemInUseLights", CAR_ENTRY_FLAG_DODGEM_INUSE_LIGHTS },
-            { "hasAdditionalColour2", CAR_ENTRY_FLAG_ENABLE_TERNARY_COLOUR },
+            { "hasAdditionalColour2", CAR_ENTRY_FLAG_ENABLE_TERTIARY_COLOUR },
             { "recalculateSpriteBounds", CAR_ENTRY_FLAG_RECALCULATE_SPRITE_BOUNDS },
             { "overrideNumberOfVerticalFrames", CAR_ENTRY_FLAG_OVERRIDE_NUM_VERTICAL_FRAMES },
             { "spriteBoundsIncludeInvertedSet", CAR_ENTRY_FLAG_SPRITE_BOUNDS_INCLUDE_INVERTED_SET },
diff --git a/src/openrct2/ride/CarEntry.h b/src/openrct2/ride/CarEntry.h
index c64bf966d0..c6188e4dd3 100644
--- a/src/openrct2/ride/CarEntry.h
+++ b/src/openrct2/ride/CarEntry.h
@@ -50,7 +50,7 @@ enum : uint32_t
     CAR_ENTRY_FLAG_DODGEM_INUSE_LIGHTS = 1
         << 7, // When set the vehicle has an additional frame for when in use. Used only by dodgems.
     CAR_ENTRY_FLAG_ALLOW_DOORS_DEPRECATED = 1 << 8, // Not used any more - every vehicle will now work with doors.
-    CAR_ENTRY_FLAG_ENABLE_TERNARY_COLOUR = 1 << 9,
+    CAR_ENTRY_FLAG_ENABLE_TERTIARY_COLOUR = 1 << 9,
     CAR_ENTRY_FLAG_RECALCULATE_SPRITE_BOUNDS = 1 << 10, // Only used during loading of the objects.
     CAR_ENTRY_FLAG_USE_16_ROTATION_FRAMES = 1
         << 11, // Instead of the default 32 rotation frames. Only used for boat hire and works only for non sloped sprites.