diff --git a/src/openrct2-ui/interface/LandTool.cpp b/src/openrct2-ui/interface/LandTool.cpp
index 2bd2d575c3..8f316c5e30 100644
--- a/src/openrct2-ui/interface/LandTool.cpp
+++ b/src/openrct2-ui/interface/LandTool.cpp
@@ -71,7 +71,7 @@ void land_tool_show_surface_style_dropdown(rct_window* w, rct_widget* widget, ui
             gDropdownItemsArgs[itemIndex] = surfaceObj->IconImageId;
             if (surfaceObj->Colour != 255)
             {
-                gDropdownItemsArgs[itemIndex] |= surfaceObj->Colour << 19 | IMAGE_TYPE_REMAP;
+                gDropdownItemsArgs[itemIndex] |= SPRITE_ID_PALETTE_COLOUR_1(surfaceObj->Colour);
             }
             if (i == currentSurfaceType)
             {
diff --git a/src/openrct2-ui/windows/Footpath.cpp b/src/openrct2-ui/windows/Footpath.cpp
index aec1ed4615..7bd117f250 100644
--- a/src/openrct2-ui/windows/Footpath.cpp
+++ b/src/openrct2-ui/windows/Footpath.cpp
@@ -951,7 +951,7 @@ static void window_footpath_start_bridge_at_point(const ScreenCoordsXY& screenCo
     _window_footpath_provisional_path_arrow_timer = 0;
     gFootpathConstructSlope = 0;
     gFootpathConstructionMode = PATH_CONSTRUCTION_MODE_BRIDGE_OR_TUNNEL;
-    gFootpathConstructValidDirections = 255;
+    gFootpathConstructValidDirections = INVALID_DIRECTION;
     window_footpath_set_enabled_and_pressed_widgets();
 }
 
@@ -977,7 +977,7 @@ static void window_footpath_construct()
 
             if (gFootpathConstructSlope == 0)
             {
-                gFootpathConstructValidDirections = 0xFF;
+                gFootpathConstructValidDirections = INVALID_DIRECTION;
             }
             else
             {
@@ -1049,7 +1049,7 @@ static void footpath_remove_tile_element(TileElement* tileElement)
     gFootpathConstructFromPosition.y -= CoordsDirectionDelta[edge].y;
     gFootpathConstructFromPosition.z = z;
     gFootpathConstructDirection = edge;
-    gFootpathConstructValidDirections = 255;
+    gFootpathConstructValidDirections = INVALID_DIRECTION;
 }
 
 /**
@@ -1179,7 +1179,7 @@ static void window_footpath_set_enabled_and_pressed_widgets()
 
         // Enable / disable directional widgets
         direction = gFootpathConstructValidDirections;
-        if (direction != 255)
+        if (direction != INVALID_DIRECTION)
         {
             disabledWidgets |= (1 << WIDX_DIRECTION_NW) | (1 << WIDX_DIRECTION_NE) | (1 << WIDX_DIRECTION_SW)
                 | (1 << WIDX_DIRECTION_SE);
diff --git a/src/openrct2-ui/windows/Land.cpp b/src/openrct2-ui/windows/Land.cpp
index 2b23dd928e..247a546186 100644
--- a/src/openrct2-ui/windows/Land.cpp
+++ b/src/openrct2-ui/windows/Land.cpp
@@ -305,7 +305,7 @@ static void window_land_invalidate(rct_window* w)
         surfaceImage = surfaceObj->IconImageId;
         if (surfaceObj->Colour != 255)
         {
-            surfaceImage |= surfaceObj->Colour << 19 | IMAGE_TYPE_REMAP;
+            surfaceImage |= SPRITE_ID_PALETTE_COLOUR_1(surfaceObj->Colour);
         }
     }
     const auto edgeObj = static_cast<TerrainEdgeObject*>(
diff --git a/src/openrct2-ui/windows/MapGen.cpp b/src/openrct2-ui/windows/MapGen.cpp
index f090751d6d..0832decf29 100644
--- a/src/openrct2-ui/windows/MapGen.cpp
+++ b/src/openrct2-ui/windows/MapGen.cpp
@@ -745,7 +745,7 @@ static void window_mapgen_base_invalidate(rct_window* w)
         surfaceImage = surfaceObj->IconImageId;
         if (surfaceObj->Colour != 255)
         {
-            surfaceImage |= surfaceObj->Colour << 19 | IMAGE_TYPE_REMAP;
+            surfaceImage |= SPRITE_ID_PALETTE_COLOUR_1(surfaceObj->Colour);
         }
     }
     const auto edgeObj = static_cast<TerrainEdgeObject*>(objManager.GetLoadedObject(OBJECT_TYPE_TERRAIN_EDGE, _wallTexture));
@@ -1048,7 +1048,7 @@ static void window_mapgen_simplex_invalidate(rct_window* w)
         surfaceImage = surfaceObj->IconImageId;
         if (surfaceObj->Colour != 255)
         {
-            surfaceImage |= surfaceObj->Colour << 19 | IMAGE_TYPE_REMAP;
+            surfaceImage |= SPRITE_ID_PALETTE_COLOUR_1(surfaceObj->Colour);
         }
     }
     const auto edgeObj = static_cast<TerrainEdgeObject*>(objManager.GetLoadedObject(OBJECT_TYPE_TERRAIN_EDGE, _wallTexture));
diff --git a/src/openrct2-ui/windows/MazeConstruction.cpp b/src/openrct2-ui/windows/MazeConstruction.cpp
index de57947645..2ea00e34f4 100644
--- a/src/openrct2-ui/windows/MazeConstruction.cpp
+++ b/src/openrct2-ui/windows/MazeConstruction.cpp
@@ -366,7 +366,7 @@ static void window_maze_construction_entrance_tooldown(const ScreenCoordsXY& scr
     if (entranceOrExitCoords.isNull())
         return;
 
-    if (gRideEntranceExitPlaceDirection == 0xFF)
+    if (gRideEntranceExitPlaceDirection == INVALID_DIRECTION)
         return;
 
     ride_id_t rideIndex = gRideEntranceExitPlaceRideIndex;
diff --git a/src/openrct2-ui/windows/RideConstruction.cpp b/src/openrct2-ui/windows/RideConstruction.cpp
index d57ee47611..e4c8572362 100644
--- a/src/openrct2-ui/windows/RideConstruction.cpp
+++ b/src/openrct2-ui/windows/RideConstruction.cpp
@@ -3673,7 +3673,7 @@ void ride_construction_toolupdate_entrance_exit(const ScreenCoordsXY& screenCoor
     gMapSelectFlags &= ~MAP_SELECT_FLAG_ENABLE_CONSTRUCT;
     gMapSelectFlags &= ~MAP_SELECT_FLAG_ENABLE_ARROW;
     CoordsXYZD entranceOrExitCoords = ride_get_entrance_or_exit_position_from_screen_position(screenCoords);
-    if (gRideEntranceExitPlaceDirection == 255)
+    if (gRideEntranceExitPlaceDirection == INVALID_DIRECTION)
     {
         ride_construction_invalidate_current_track();
         return;
@@ -3914,7 +3914,7 @@ static void ride_construction_tooldown_entrance_exit(const ScreenCoordsXY& scree
     gMapSelectFlags &= ~MAP_SELECT_FLAG_ENABLE_ARROW;
 
     CoordsXYZD entranceOrExitCoords = ride_get_entrance_or_exit_position_from_screen_position(screenCoords);
-    if (gRideEntranceExitPlaceDirection == 255)
+    if (gRideEntranceExitPlaceDirection == INVALID_DIRECTION)
         return;
 
     auto rideEntranceExitPlaceAction = RideEntranceExitPlaceAction(
diff --git a/src/openrct2/actions/StaffHireNewAction.hpp b/src/openrct2/actions/StaffHireNewAction.hpp
index c3227df30c..77b4280e5c 100644
--- a/src/openrct2/actions/StaffHireNewAction.hpp
+++ b/src/openrct2/actions/StaffHireNewAction.hpp
@@ -237,7 +237,7 @@ private:
             newPeep->pathfind_goal.x = 0xFF;
             newPeep->pathfind_goal.y = 0xFF;
             newPeep->pathfind_goal.z = 0xFF;
-            newPeep->pathfind_goal.direction = 0xFF;
+            newPeep->pathfind_goal.direction = INVALID_DIRECTION;
 
             uint8_t colour = staff_get_colour(_staffType);
             newPeep->tshirt_colour = colour;
diff --git a/src/openrct2/object/TerrainSurfaceObject.cpp b/src/openrct2/object/TerrainSurfaceObject.cpp
index 6c6c618bfd..a79b0fd600 100644
--- a/src/openrct2/object/TerrainSurfaceObject.cpp
+++ b/src/openrct2/object/TerrainSurfaceObject.cpp
@@ -51,7 +51,7 @@ void TerrainSurfaceObject::DrawPreview(rct_drawpixelinfo* dpi, int32_t width, in
     uint32_t imageId = GetImageId({}, 1, 0, 0, false, false);
     if (Colour != 255)
     {
-        imageId |= Colour << 19 | IMAGE_TYPE_REMAP;
+        imageId |= SPRITE_ID_PALETTE_COLOUR_1(Colour);
     }
 
     int32_t x0 = 0;
diff --git a/src/openrct2/paint/VirtualFloor.cpp b/src/openrct2/paint/VirtualFloor.cpp
index 7eb2f3f42a..39721ec3d9 100644
--- a/src/openrct2/paint/VirtualFloor.cpp
+++ b/src/openrct2/paint/VirtualFloor.cpp
@@ -355,9 +355,9 @@ void virtual_floor_paint(paint_session* session)
         }
     }
 
-    uint32_t remap_base = COLOUR_DARK_PURPLE << 19 | IMAGE_TYPE_REMAP;
-    uint32_t remap_edge = COLOUR_WHITE << 19 | IMAGE_TYPE_REMAP;
-    uint32_t remap_lit = COLOUR_DARK_BROWN << 19 | IMAGE_TYPE_REMAP;
+    uint32_t remap_base = SPRITE_ID_PALETTE_COLOUR_1(COLOUR_DARK_PURPLE);
+    uint32_t remap_edge = SPRITE_ID_PALETTE_COLOUR_1(COLOUR_WHITE);
+    uint32_t remap_lit = SPRITE_ID_PALETTE_COLOUR_1(COLOUR_DARK_BROWN);
 
     // Edges which are internal to objects (i.e., the tile on both sides
     //  is occupied/lit) are not rendered to provide visual clarity.
diff --git a/src/openrct2/paint/tile_element/Paint.Surface.cpp b/src/openrct2/paint/tile_element/Paint.Surface.cpp
index e09e646f24..9b4e8e646f 100644
--- a/src/openrct2/paint/tile_element/Paint.Surface.cpp
+++ b/src/openrct2/paint/tile_element/Paint.Surface.cpp
@@ -315,7 +315,7 @@ static uint32_t get_surface_image(
             { session->MapPosition.x >> 5, session->MapPosition.y >> 5 }, grassLength, rotation, offset, grid, underground);
         if (obj->Colour != 255)
         {
-            image |= obj->Colour << 19 | IMAGE_TYPE_REMAP;
+            image |= SPRITE_ID_PALETTE_COLOUR_1(obj->Colour);
         }
     }
     return image;
@@ -330,7 +330,7 @@ static uint32_t get_surface_pattern(uint8_t index, int32_t offset)
         image = obj->PatternBaseImageId + offset;
         if (obj->Colour != 255)
         {
-            image |= obj->Colour << 19 | IMAGE_TYPE_REMAP;
+            image |= SPRITE_ID_PALETTE_COLOUR_1(obj->Colour);
         }
     }
     return image;
diff --git a/src/openrct2/paint/tile_element/Paint.Wall.cpp b/src/openrct2/paint/tile_element/Paint.Wall.cpp
index 1a84a6f388..b15670faff 100644
--- a/src/openrct2/paint/tile_element/Paint.Wall.cpp
+++ b/src/openrct2/paint/tile_element/Paint.Wall.cpp
@@ -171,7 +171,7 @@ void fence_paint(paint_session* session, uint8_t direction, int32_t height, cons
     }
 
     int32_t primaryColour = tile_element->AsWall()->GetPrimaryColour();
-    uint32_t imageColourFlags = primaryColour << 19 | IMAGE_TYPE_REMAP;
+    uint32_t imageColourFlags = SPRITE_ID_PALETTE_COLOUR_1(primaryColour);
     uint32_t dword_141F718 = imageColourFlags + 0x23800006;
 
     if (sceneryEntry->wall.flags & WALL_SCENERY_HAS_SECONDARY_COLOUR)
diff --git a/src/openrct2/peep/Peep.cpp b/src/openrct2/peep/Peep.cpp
index 13bf14a5dd..9cf19e6a3e 100644
--- a/src/openrct2/peep/Peep.cpp
+++ b/src/openrct2/peep/Peep.cpp
@@ -1749,7 +1749,7 @@ Peep* Peep::Generate(const CoordsXYZ& coords)
     peep->pathfind_goal.x = 0xFF;
     peep->pathfind_goal.y = 0xFF;
     peep->pathfind_goal.z = 0xFF;
-    peep->pathfind_goal.direction = 0xFF;
+    peep->pathfind_goal.direction = INVALID_DIRECTION;
     peep->item_standard_flags = 0;
     peep->item_extra_flags = 0;
     peep->guest_heading_to_ride_id = RIDE_ID_NULL;
@@ -3196,7 +3196,7 @@ void peep_reset_pathfind_goal(Peep* peep)
     peep->pathfind_goal.x = 0xFF;
     peep->pathfind_goal.y = 0xFF;
     peep->pathfind_goal.z = 0xFF;
-    peep->pathfind_goal.direction = 0xFF;
+    peep->pathfind_goal.direction = INVALID_DIRECTION;
 }
 
 /**
diff --git a/src/openrct2/peep/Staff.cpp b/src/openrct2/peep/Staff.cpp
index 052d6d25cc..1db63bd1bf 100644
--- a/src/openrct2/peep/Staff.cpp
+++ b/src/openrct2/peep/Staff.cpp
@@ -616,7 +616,7 @@ static bool staff_path_finding_handyman(Peep* peep)
 {
     peep->staff_mowing_timeout++;
 
-    uint8_t litterDirection = 0xFF;
+    uint8_t litterDirection = INVALID_DIRECTION;
     uint8_t validDirections = staff_get_valid_patrol_directions(peep, peep->NextLoc.x, peep->NextLoc.y);
 
     if ((peep->staff_orders & STAFF_ORDERS_SWEEPING) && ((gCurrentTicks + peep->sprite_index) & 0xFFF) > 110)
@@ -625,7 +625,7 @@ static bool staff_path_finding_handyman(Peep* peep)
     }
 
     Direction direction = INVALID_DIRECTION;
-    if (litterDirection == 0xFF && (peep->staff_orders & STAFF_ORDERS_MOWING) && peep->staff_mowing_timeout >= 12)
+    if (litterDirection == INVALID_DIRECTION && (peep->staff_orders & STAFF_ORDERS_MOWING) && peep->staff_mowing_timeout >= 12)
     {
         direction = staff_handyman_direction_to_uncut_grass(peep, validDirections);
     }
@@ -651,7 +651,7 @@ static bool staff_path_finding_handyman(Peep* peep)
             else
             {
                 bool chooseRandom = true;
-                if (litterDirection != 0xFF && pathDirections & (1 << litterDirection))
+                if (litterDirection != INVALID_DIRECTION && pathDirections & (1 << litterDirection))
                 {
                     if ((scenario_rand() & 0xFFFF) >= 0x1999)
                     {
diff --git a/src/openrct2/rct1/S4Importer.cpp b/src/openrct2/rct1/S4Importer.cpp
index 60a62b308a..5316fd5143 100644
--- a/src/openrct2/rct1/S4Importer.cpp
+++ b/src/openrct2/rct1/S4Importer.cpp
@@ -1529,7 +1529,7 @@ private:
         dst->pathfind_goal.x = 0xFF;
         dst->pathfind_goal.y = 0xFF;
         dst->pathfind_goal.z = 0xFF;
-        dst->pathfind_goal.direction = 0xFF;
+        dst->pathfind_goal.direction = INVALID_DIRECTION;
 
         // Guests' favourite ride was only saved in LL.
         // Set it to N/A if the save comes from the original or AA.
diff --git a/src/openrct2/ride/Ride.cpp b/src/openrct2/ride/Ride.cpp
index f17d8789cf..5158f8201c 100644
--- a/src/openrct2/ride/Ride.cpp
+++ b/src/openrct2/ride/Ride.cpp
@@ -119,7 +119,7 @@ uint8_t gRideEntranceExitPlaceType;
 ride_id_t gRideEntranceExitPlaceRideIndex;
 uint8_t gRideEntranceExitPlaceStationIndex;
 uint8_t gRideEntranceExitPlacePreviousRideConstructionState;
-uint8_t gRideEntranceExitPlaceDirection;
+Direction gRideEntranceExitPlaceDirection;
 
 uint8_t gLastEntranceStyle;
 
@@ -1091,7 +1091,7 @@ void ride_remove_peeps(Ride* ride)
     int32_t exitX = 0;
     int32_t exitY = 0;
     int32_t exitZ = 0;
-    int32_t exitDirection = 255;
+    int32_t exitDirection = INVALID_DIRECTION;
     if (stationIndex != -1)
     {
         TileCoordsXYZD location = ride_get_exit_location(ride, stationIndex);
@@ -1130,7 +1130,7 @@ void ride_remove_peeps(Ride* ride)
 
             peep->Invalidate();
 
-            if (exitDirection == 255)
+            if (exitDirection == INVALID_DIRECTION)
             {
                 CoordsXYZ newLoc = { peep->NextLoc.ToTileCentre(), peep->NextLoc.z };
                 if (peep->GetNextIsSloped())
@@ -6145,7 +6145,7 @@ CoordsXYZD ride_get_entrance_or_exit_position_from_screen_position(const ScreenC
     Ride* ride;
     CoordsXYZD entranceExitCoords{};
 
-    gRideEntranceExitPlaceDirection = 255;
+    gRideEntranceExitPlaceDirection = INVALID_DIRECTION;
     CoordsXY unusedCoords;
     get_map_coordinates_from_pos(screenCoords, 0xFFFB, unusedCoords, &interactionType, &tileElement, &viewport);
     if (interactionType != 0)
@@ -6256,7 +6256,7 @@ CoordsXYZD ride_get_entrance_or_exit_position_from_screen_position(const ScreenC
             }
             entranceExitCoords.direction = (entranceExitCoords.direction + 1) & 3;
         }
-        gRideEntranceExitPlaceDirection = 0xFF;
+        gRideEntranceExitPlaceDirection = INVALID_DIRECTION;
     }
     else
     {
@@ -6879,14 +6879,14 @@ void sub_6CB945(Ride* ride)
             CoordsXYZ location = { ride->stations[stationId].Start.x * 32, ride->stations[stationId].Start.y * 32,
                                    ride->stations[stationId].GetBaseZ() };
             auto tileHeight = TileCoordsXYZ(location).z;
-            uint8_t direction = 0xFF;
+            uint8_t direction = INVALID_DIRECTION;
 
             bool specialTrack = false;
             TileElement* tileElement = nullptr;
 
             while (true)
             {
-                if (direction != 0xFF)
+                if (direction != INVALID_DIRECTION)
                 {
                     location.x -= CoordsDirectionDelta[direction].x;
                     location.y -= CoordsDirectionDelta[direction].y;