diff --git a/api/xr.js b/api/xr.js
index 45cb3d58..9e0051aa 100644
--- a/api/xr.js
+++ b/api/xr.js
@@ -51,6 +51,194 @@ export const flockXR = {
       color: "white",
     });
   },
+  async setControllerLedColor(controllerIndex, color) {
+    console.log("[setControllerLedColor] called", { controllerIndex, color });
+    const index = Math.max(0, Math.trunc(Number(controllerIndex)));
+    const xrGamepads =
+      flock.xrHelper?.baseExperience?.input?.inputSources
+        ?.map((inputSource) => inputSource?.gamepad)
+        ?.filter(Boolean) ?? [];
+    const browserGamepads = Array.from(navigator?.getGamepads?.() ?? []).filter(
+      Boolean,
+    );
+    console.log("[setControllerLedColor] gamepad pools", {
+      index,
+      xrGamepadCount: xrGamepads.length,
+      browserGamepadCount: browserGamepads.length,
+      xrGamepads: xrGamepads.map((gp) => ({
+        id: gp?.id,
+        mapping: gp?.mapping,
+      })),
+      browserGamepads: browserGamepads.map((gp) => ({
+        id: gp?.id,
+        mapping: gp?.mapping,
+      })),
+    });
+
+    const gamepad = xrGamepads[index] ?? browserGamepads[index];
+    console.log("[setControllerLedColor] selected gamepad", {
+      index,
+      selectedFrom: xrGamepads[index] ? "xrGamepads" : "browserGamepads",
+      gamepadId: gamepad?.id,
+      hasLightIndicator: typeof gamepad?.lightIndicator?.setColor === "function",
+      hasLedsArray: Array.isArray(gamepad?.leds),
+      hasFirstLedSetter: typeof gamepad?.leds?.[0]?.setColor === "function",
+    });
+
+    if (!gamepad) {
+      console.log("[setControllerLedColor] no gamepad found for index", index);
+      return;
+    }
+
+    const hexToRgb = (hex) => {
+      const trimmed = String(hex).trim();
+      const match = trimmed.match(/^#?([0-9a-fA-F]{6})$/);
+      if (!match) return null;
+      const value = match[1];
+      return {
+        r: parseInt(value.slice(0, 2), 16),
+        g: parseInt(value.slice(2, 4), 16),
+        b: parseInt(value.slice(4, 6), 16),
+      };
+    };
+
+    const rgb = hexToRgb(color);
+    if (!rgb) {
+      console.log("[setControllerLedColor] invalid color format", { color });
+      return;
+    }
+    console.log("[setControllerLedColor] parsed color", { color, rgb });
+
+    try {
+      if (typeof gamepad.lightIndicator?.setColor === "function") {
+        gamepad.lightIndicator.setColor(rgb.r, rgb.g, rgb.b);
+        console.log("[setControllerLedColor] used lightIndicator.setColor");
+        return;
+      }
+
+      if (typeof gamepad.leds?.[0]?.setColor === "function") {
+        gamepad.leds[0].setColor(rgb.r, rgb.g, rgb.b);
+        console.log("[setControllerLedColor] used leds[0].setColor");
+        return;
+      }
+      console.log(
+        "[setControllerLedColor] no supported LED API on selected gamepad",
+      );
+
+      const hidResult = await this.setPlayStationControllerLedViaHid?.(
+        gamepad,
+        rgb,
+      );
+      if (hidResult) {
+        console.log("[setControllerLedColor] used WebHID fallback");
+      } else {
+        console.log("[setControllerLedColor] WebHID fallback unavailable/failed");
+      }
+    } catch {
+      console.log("[setControllerLedColor] LED set failed");
+      // silent by design
+    }
+  },
+  async setPlayStationControllerLedViaHid(gamepad, rgb) {
+    try {
+      if (!navigator?.hid) return false;
+      const id = String(gamepad?.id ?? "");
+      const vendorMatch = id.match(/Vendor:\s*([0-9a-fA-F]{4})/);
+      const productMatch = id.match(/Product:\s*([0-9a-fA-F]{4})/);
+      const vendorId = vendorMatch ? parseInt(vendorMatch[1], 16) : null;
+      const productId = productMatch ? parseInt(productMatch[1], 16) : null;
+      if (vendorId !== 0x054c || !productId) return false;
+
+      const paired = navigator.hid
+        .getDevices()
+        .then((devices) =>
+          devices.find(
+            (d) => d.vendorId === vendorId && d.productId === productId,
+          ),
+        );
+      let device = await paired;
+      if (!device) {
+        const requested = await navigator.hid.requestDevice({
+          filters: [{ vendorId, productId, usagePage: 0x01, usage: 0x05 }],
+        });
+        device = requested?.[0];
+      }
+      if (!device) return false;
+      if (!device.opened) await device.open();
+
+      const outputReportIds = new Set(
+        device.collections.flatMap((collection) =>
+          (collection.outputReports || []).map((report) => report.reportId),
+        ),
+      );
+      console.log("[setControllerLedColor] output report IDs", [...outputReportIds]);
+
+      const ds4ReportId = 0x05;
+      const ds4Data = new Uint8Array(31);
+      ds4Data[0] = 0xff;
+      ds4Data[1] = 0x00;
+      ds4Data[2] = 0x00;
+      ds4Data[5] = rgb.r;
+      ds4Data[6] = rgb.g;
+      ds4Data[7] = rgb.b;
+
+      if (productId === 0x09cc || productId === 0x0ce6) {
+        const usbData = new Uint8Array(47);
+        usbData[0] = 0x03; // valid flag 1 (lightbar + player leds)
+        usbData[1] = 0x00; // motor right
+        usbData[2] = 0x00; // motor left
+        usbData[43] = rgb.r;
+        usbData[44] = rgb.g;
+        usbData[45] = rgb.b;
+
+        const btData = new Uint8Array(77);
+        btData[0] = 0x03; // valid flag 1
+        btData[1] = 0x00; // valid flag 2
+        btData[2] = 0x00; // motor right
+        btData[3] = 0x00; // motor left
+        btData[44] = rgb.r;
+        btData[45] = rgb.g;
+        btData[46] = rgb.b;
+
+        const attempts = [];
+        if (outputReportIds.has(0x05)) {
+          attempts.push({
+            reportId: 0x05,
+            data: ds4Data,
+            label: "dualsense-ds4compat-0x05",
+          });
+        }
+        attempts.push(
+          { reportId: 0x02, data: usbData, label: "dualsense-usb-0x02" },
+          { reportId: 0x31, data: btData, label: "dualsense-bt-0x31" },
+        );
+
+        for (const attempt of attempts) {
+          try {
+            await device.sendReport(attempt.reportId, attempt.data);
+            console.log(
+              "[setControllerLedColor] WebHID sendReport success",
+              attempt.label,
+            );
+            return true;
+          } catch (error) {
+            console.log(
+              "[setControllerLedColor] WebHID sendReport failed",
+              attempt.label,
+              error,
+            );
+          }
+        }
+        return false;
+      }
+
+      await device.sendReport(ds4ReportId, ds4Data);
+      return true;
+    } catch (error) {
+      console.log("[setControllerLedColor] WebHID fallback error", error);
+      return false;
+    }
+  },
   exportMesh(meshName, format) {
     //meshName = "scene";
 
diff --git a/blocks/xr.js b/blocks/xr.js
index db7c1b7e..10a58761 100644
--- a/blocks/xr.js
+++ b/blocks/xr.js
@@ -175,4 +175,31 @@ export function defineXRBlocks() {
       this.setStyle("scene_blocks");
     },
   };
+
+  Blockly.Blocks["set_controller_led_color"] = {
+    init: function () {
+      this.jsonInit({
+        type: "set_controller_led_color",
+        message0: translate("set_controller_led_color"),
+        args0: [
+          {
+            type: "input_value",
+            name: "CONTROLLER_INDEX",
+            check: "Number",
+          },
+          {
+            type: "input_value",
+            name: "COLOR",
+            check: "Colour",
+          },
+        ],
+        previousStatement: null,
+        nextStatement: null,
+        colour: categoryColours["Scene"],
+        tooltip: getTooltip("set_controller_led_color"),
+      });
+      this.setHelpUrl(getHelpUrlFor(this.type));
+      this.setStyle("scene_blocks");
+    },
+  };
 }
diff --git a/flock.js b/flock.js
index c884e556..509376dc 100644
--- a/flock.js
+++ b/flock.js
@@ -998,6 +998,7 @@ export const flock = {
       cameraControl: this.cameraControl?.bind(this),
       setCameraBackground: this.setCameraBackground?.bind(this),
       setXRMode: this.setXRMode?.bind(this),
+      setControllerLedColor: this.setControllerLedColor?.bind(this),
       applyForce: this.applyForce?.bind(this),
       moveByVector: this.moveByVector?.bind(this),
       glideTo: this.glideTo?.bind(this),
@@ -1108,6 +1109,7 @@ export const flock = {
       "setSky",
       "setFog",
       "setCameraBackground",
+      "setControllerLedColor",
       "lightIntensity",
       "lightColor",
       "create3DText",
diff --git a/generators/generators-scene.js b/generators/generators-scene.js
index 4871d258..c27c1cac 100644
--- a/generators/generators-scene.js
+++ b/generators/generators-scene.js
@@ -675,4 +675,21 @@ export function registerSceneGenerators(javascriptGenerator) {
     // Generate the code that calls the helper function
     return `exportMesh(${meshVar}, "${format}");\n`;
   };
+
+  javascriptGenerator.forBlock["set_controller_led_color"] = function (block) {
+    const controllerIndex =
+      javascriptGenerator.valueToCode(
+        block,
+        "CONTROLLER_INDEX",
+        javascriptGenerator.ORDER_NONE,
+      ) || "0";
+    const color =
+      javascriptGenerator.valueToCode(
+        block,
+        "COLOR",
+        javascriptGenerator.ORDER_NONE,
+      ) || '"#ffffff"';
+
+    return `await setControllerLedColor(${controllerIndex}, ${color});\n`;
+  };
 }
diff --git a/locale/en.js b/locale/en.js
index 9614fc0e..2cea4866 100644
--- a/locale/en.js
+++ b/locale/en.js
@@ -338,6 +338,7 @@ export default {
   controller_rumble: "rumble %1 motor at strength %2 for %3 ms",
   controller_rumble_pattern:
     "rumble %1 motor strength %2 on %3 ms off %4 ms %5 times",
+  set_controller_led_color: "set controller %1 LED color to %2",
 
   // Blockly message overrides for English
   LISTS_CREATE_WITH_INPUT_WITH: "list",
@@ -648,6 +649,8 @@ export default {
     "Make a connected game controller rumble. Choose all, left, or right motor, set the strength (0 to 1), and how long to rumble in milliseconds.\nKeyword: rumble",
   controller_rumble_pattern_tooltip:
     "Make a connected game controller rumble in a repeating pattern. Set the motor, strength (0 to 1), on time, off time, and number of repeats.\nKeyword: rumble pattern",
+  set_controller_led_color_tooltip:
+    "Set the LED color for a connected game controller by index. If LED control is unsupported, this block does nothing.\nKeyword: controller led",
 
   // Dropdown option translations
   AWAIT_option: "await",
diff --git a/locale/es.js b/locale/es.js
index f3852709..f6e7c0a4 100644
--- a/locale/es.js
+++ b/locale/es.js
@@ -337,6 +337,7 @@ export default {
   controller_rumble: "vibrar motor %1 con fuerza %2 durante %3 ms", // human
   controller_rumble_pattern:
     "vibrar %1 fuerza de motor %2 encendido %3 ms apagado %4 ms %5 veces", // human
+  set_controller_led_color: "establecer color del LED del mando %1 a %2", // human
 
   // Blockly message overrides for English
   LISTS_CREATE_WITH_INPUT_WITH: "lista", // human
@@ -663,6 +664,8 @@ export default {
     "Hace vibrar un mando conectado. Elige todos, el izquierdo o el derecho motor, establece la fuerza (0 a 1) y cuánto tiempo para vibrar en milisegundos.\nPalabra clave: vibrar", // human
   controller_rumble_pattern_tooltip:
     "Hace vibrar un mando conectado en un patrón repetido. Establece el motor, la fuerza (0 a 1), el tiempo encendido, el tiempo apagado y el número de repeticiones.\nPalabra clave: patrón de vibrar", // human
+  set_controller_led_color_tooltip:
+    "Establece el color del LED de un mando conectado por índice. Si el control de LED no es compatible, este bloque no hace nada.\nPalabra clave: led del mando", // human
 
   // Dropdown option translations
   AWAIT_option: "esperar", // human
diff --git a/toolbox.js b/toolbox.js
index 5454716e..ee8fc509 100644
--- a/toolbox.js
+++ b/toolbox.js
@@ -607,6 +607,29 @@ const toolboxSceneXR = {
       type: "export_mesh",
       keyword: "export",
     },
+    {
+      kind: "block",
+      type: "set_controller_led_color",
+      keyword: "controller led",
+      inputs: {
+        CONTROLLER_INDEX: {
+          shadow: {
+            type: "math_number",
+            fields: {
+              NUM: 0,
+            },
+          },
+        },
+        COLOR: {
+          shadow: {
+            type: "colour",
+            fields: {
+              COLOR: "#ffffff",
+            },
+          },
+        },
+      },
+    },
     /*{
                         kind: "block",
                         type: "play_rumble_pattern",