diff --git a/data/language/en-GB.txt b/data/language/en-GB.txt
index 43826d1b23..628440ec4e 100644
--- a/data/language/en-GB.txt
+++ b/data/language/en-GB.txt
@@ -3730,6 +3730,8 @@ STR_6657    :Land Not Owned
 STR_6658    :Set land to be not owned by the park, nor available for purchase
 STR_6659    :Guests ignore prices
 STR_6660    :Guests will ignore the price of rides and stalls.
+STR_6661    :Randomise all
+STR_6662    :Randomise colours for every train or vehicle.
 
 #############
 # Scenarios #
diff --git a/distribution/changelog.txt b/distribution/changelog.txt
index 0a093ed6ec..c1df46b317 100644
--- a/distribution/changelog.txt
+++ b/distribution/changelog.txt
@@ -3,6 +3,7 @@
 - Feature: [#15750] Allow using different types of park entrance in one park.
 - Feature: [#20942] Allow removing all park fences from the Cheats window.
 - Feature: [#21675] Guests ignore price limit cheat.
+- Feature: [#22206] Add option to randomise train or vehicle colours.
 - Feature: [#22392] [Plugin] Expose ride vehicle’s spin to the plugin API.
 - Feature: [#22414] Finance graphs can be resized.
 - Change: [#21659] Increase the Hybrid Roller Coaster’s maximum lift speed to 17 km/h (11 mph).
diff --git a/src/openrct2-ui/UiStringIds.h b/src/openrct2-ui/UiStringIds.h
index 20f053e832..4d4d5d132a 100644
--- a/src/openrct2-ui/UiStringIds.h
+++ b/src/openrct2-ui/UiStringIds.h
@@ -1478,6 +1478,8 @@ namespace OpenRCT2
         STR_QUEUE_TIME_MINUTE = 1359,
         STR_QUEUE_TIME_MINUTES = 1360,
         STR_RANDOM_COLOUR = 6501,
+        STR_RANDOMISE_VEHICLE_COLOURS = 6661,
+        STR_RANDOMISE_VEHICLE_COLOURS_TIP = 6662,
         STR_RATING_EXTREME = 2376,
         STR_RATING_HIGH = 2374,
         STR_RATING_LOW = 2372,
diff --git a/src/openrct2-ui/windows/Ride.cpp b/src/openrct2-ui/windows/Ride.cpp
index 554decfc4f..1e8252309b 100644
--- a/src/openrct2-ui/windows/Ride.cpp
+++ b/src/openrct2-ui/windows/Ride.cpp
@@ -194,6 +194,7 @@ enum {
     WIDX_VEHICLE_TRIM_COLOUR,
     WIDX_VEHICLE_TERTIARY_COLOUR,
     WIDX_SELL_ITEM_RANDOM_COLOUR_CHECKBOX,
+    WIDX_RANDOMISE_VEHICLE_COLOURS,
 
     WIDX_PLAY_MUSIC = 14,
     WIDX_MUSIC,
@@ -338,6 +339,7 @@ static Widget _colourWidgets[] = {
     MakeWidget({ 99, 190}, { 12, 12}, WindowWidgetType::ColourBtn, WindowColour::Secondary, 0xFFFFFFFF,          STR_SELECT_ADDITIONAL_COLOUR_1_TIP           ),
     MakeWidget({119, 190}, { 12, 12}, WindowWidgetType::ColourBtn, WindowColour::Secondary, 0xFFFFFFFF,          STR_SELECT_ADDITIONAL_COLOUR_2_TIP           ),
     MakeWidget({100,  74}, {239, 12}, WindowWidgetType::Checkbox,  WindowColour::Secondary, STR_RANDOM_COLOUR                                                 ),
+    MakeWidget({139, 190}, {110, 12}, WindowWidgetType::Button,    WindowColour::Secondary, STR_RANDOMISE_VEHICLE_COLOURS, STR_RANDOMISE_VEHICLE_COLOURS_TIP  ),
     kWidgetsEnd,
 };
 
@@ -4157,6 +4159,7 @@ static_assert(std::size(RatingNames) == 6);
                     ToolSet(*this, WIDX_PAINT_INDIVIDUAL_AREA, Tool::PaintDown);
                     break;
                 case WIDX_SELL_ITEM_RANDOM_COLOUR_CHECKBOX:
+                {
                     auto ride = GetRide(rideId);
                     if (ride != nullptr)
                     {
@@ -4166,6 +4169,61 @@ static_assert(std::size(RatingNames) == 6);
                         GameActions::Execute(&rideSetAppearanceAction);
                     }
                     break;
+                }
+                case WIDX_RANDOMISE_VEHICLE_COLOURS:
+                {
+                    auto ride = GetRide(rideId);
+                    if (ride == nullptr)
+                        return;
+
+                    auto rideEntry = ride->GetRideEntry();
+                    if (rideEntry == nullptr)
+                        return;
+
+                    bool allowChangingTrimColour = false;
+                    bool allowChangingTertiaryColour = false;
+                    for (int32_t i = 0; i < ride->num_cars_per_train; i++)
+                    {
+                        uint8_t vehicleTypeIndex = RideEntryGetVehicleAtPosition(ride->subtype, ride->num_cars_per_train, i);
+
+                        if (rideEntry->Cars[vehicleTypeIndex].flags & CAR_ENTRY_FLAG_ENABLE_TRIM_COLOUR)
+                        {
+                            allowChangingTrimColour = true;
+                        }
+                        if (rideEntry->Cars[vehicleTypeIndex].flags & CAR_ENTRY_FLAG_ENABLE_TERTIARY_COLOUR)
+                        {
+                            allowChangingTertiaryColour = true;
+                        }
+                    }
+
+                    int32_t numItems = ride->NumTrains;
+                    if (ride->vehicleColourSettings != VehicleColourSettings::perTrain)
+                        numItems = ride->num_cars_per_train;
+
+                    uint16_t i, colour;
+                    for (i = 0; i < numItems; i++)
+                    {
+                        colour = UtilRand() & COLOUR_NUM_NORMAL;
+                        auto vehicleSetBodyColourAction = RideSetAppearanceAction(
+                            rideId, RideSetAppearanceType::VehicleColourBody, colour, i);
+                        GameActions::Execute(&vehicleSetBodyColourAction);
+                        if (allowChangingTrimColour)
+                        {
+                            colour = UtilRand() & COLOUR_NUM_NORMAL;
+                            auto vehicleSetTrimColourAction = RideSetAppearanceAction(
+                                rideId, RideSetAppearanceType::VehicleColourTrim, colour, i);
+                            GameActions::Execute(&vehicleSetTrimColourAction);
+                            if (allowChangingTertiaryColour)
+                            {
+                                colour = UtilRand() & COLOUR_NUM_NORMAL;
+                                auto vehicleSetTertiaryColourAction = RideSetAppearanceAction(
+                                    rideId, RideSetAppearanceType::VehicleColourTertiary, colour, i);
+                                GameActions::Execute(&vehicleSetTertiaryColourAction);
+                            }
+                        }
+                    }
+                    break;
+                }
             }
         }
 
@@ -4557,7 +4615,14 @@ static_assert(std::size(RatingNames) == 6);
                 && ride->GetRideTypeDescriptor().HasFlag(RtdFlag::hasVehicleColours))
             {
                 if (ride->vehicleColourSettings == VehicleColourSettings::same)
+                {
                     _vehicleIndex = 0;
+                    widgets[WIDX_RANDOMISE_VEHICLE_COLOURS].type = WindowWidgetType::Empty;
+                }
+                else
+                {
+                    widgets[WIDX_RANDOMISE_VEHICLE_COLOURS].type = WindowWidgetType::Button;
+                }
 
                 vehicleColour = RideGetVehicleColour(*ride, _vehicleIndex);
 
@@ -4647,6 +4712,7 @@ static_assert(std::size(RatingNames) == 6);
                 widgets[WIDX_VEHICLE_BODY_COLOUR].type = WindowWidgetType::Empty;
                 widgets[WIDX_VEHICLE_TRIM_COLOUR].type = WindowWidgetType::Empty;
                 widgets[WIDX_VEHICLE_TERTIARY_COLOUR].type = WindowWidgetType::Empty;
+                widgets[WIDX_RANDOMISE_VEHICLE_COLOURS].type = WindowWidgetType::Empty;
             }
 
             ft.Rewind();