diff --git a/module/deltagreen.js b/module/deltagreen.js
index 6848474..5acf05c 100644
--- a/module/deltagreen.js
+++ b/module/deltagreen.js
@@ -17,6 +17,7 @@ import {
   rollSkillTestAndDamageForOwnedItem,
 } from "./other/macro-functions.js";
 import { handleInlineActions } from "./other/inline.js";
+import { registerDG2DiceSoNice } from "./integrations/dice-so-nice.js";
 import DGNPCSheet from "./sheets/npc-sheet.js";
 import DGUnnaturalSheet from "./sheets/unnatural-sheet.js";
 import DGVehicleSheet from "./sheets/vehicle-sheet.js";
@@ -211,6 +212,15 @@ Hooks.on("createActor", async (actor, options, userId) => {
   }
 });
 
+// Register themed Delta Green 2 dice with Dice So Nice, if present.
+Hooks.once("diceSoNiceReady", (dice3d) => {
+  try {
+    registerDG2DiceSoNice(dice3d);
+  } catch (ex) {
+    console.warn("Delta Green 2 | Failed to register Dice So Nice theme", ex);
+  }
+});
+
 Hooks.on("renderGamePause", function (_, html, options) {
   if (options.cssClass !== "paused") return;
 
diff --git a/module/integrations/dice-so-nice.js b/module/integrations/dice-so-nice.js
new file mode 100644
index 0000000..f5a7e2d
--- /dev/null
+++ b/module/integrations/dice-so-nice.js
@@ -0,0 +1,98 @@
+/**
+ * Delta Green 2 — Dice So Nice integration.
+ *
+ * Registers three themed colorsets and applies them per roll type:
+ *  - dg2-agency:    olive drab, bone numerals — skill/stat/luck/weapon checks
+ *  - dg2-lethality: black and blood red — lethality and damage rolls
+ *  - dg2-unnatural: void violet with a sickly glow — SAN checks, rituals,
+ *                   and sanity damage
+ */
+
+const CATEGORY = "Delta Green 2";
+
+/**
+ * Register the DG2 dice appearance with Dice So Nice.
+ * Called from the diceSoNiceReady hook.
+ *
+ * @param {Object} dice3d - the Dice So Nice API object.
+ */
+export function registerDG2DiceSoNice(dice3d) {
+  // "default" sets this as the table default for users who have not
+  // customized their own dice, so the system looks right out of the box.
+  dice3d.addColorset(
+    {
+      name: "dg2-agency",
+      description: "DG2 — Agency Issue",
+      category: CATEGORY,
+      foreground: "#e8e4d5",
+      background: "#3a4a24",
+      outline: "#151a0d",
+      edge: "#242f16",
+      texture: "cloudy",
+      material: "metal",
+      font: "Special Elite",
+      visibility: "visible",
+    },
+    "default",
+  );
+
+  dice3d.addColorset({
+    name: "dg2-lethality",
+    description: "DG2 — Lethal Force",
+    category: CATEGORY,
+    foreground: "#ff3b30",
+    background: "#0d0d0f",
+    outline: "#000000",
+    edge: "#3d0a06",
+    texture: "fire",
+    material: "metal",
+    font: "Special Elite",
+    visibility: "visible",
+  });
+
+  dice3d.addColorset({
+    name: "dg2-unnatural",
+    description: "DG2 — The Unnatural",
+    category: CATEGORY,
+    foreground: "#8dffb0",
+    background: "#1a0b2e",
+    outline: "#050208",
+    edge: "#2c1150",
+    texture: "astral",
+    material: "glass",
+    font: "Special Elite",
+    emissive: "#2a0a4a",
+    emissiveIntensity: 0.4,
+    visibility: "visible",
+  });
+}
+
+/**
+ * Tag every die in a roll with a DG2 colorset so Dice So Nice renders
+ * the themed dice for this roll regardless of the user's default.
+ *
+ * @param {Roll} roll - an evaluated (or about to be evaluated) roll.
+ * @param {"dg2-agency"|"dg2-lethality"|"dg2-unnatural"} colorset
+ */
+export function tagRollDice(roll, colorset) {
+  try {
+    for (const die of roll.dice) {
+      die.options.colorset = colorset;
+    }
+  } catch {
+    // Dice theming must never break the roll itself.
+  }
+}
+
+/**
+ * Pick the DG2 colorset for a percentile roll based on its type.
+ *
+ * @param {DGPercentileRoll} roll
+ * @returns {string} colorset name
+ */
+export function colorsetForPercentileRoll(roll) {
+  if (roll.type === "sanity" || roll.key === "ritual") {
+    return "dg2-unnatural";
+  }
+  return "dg2-agency";
+}
diff --git a/module/roll/roll.js b/module/roll/roll.js
index f8501a5..20f68c2 100644
--- a/module/roll/roll.js
+++ b/module/roll/roll.js
@@ -1,6 +1,10 @@
 /* eslint-disable max-classes-per-file */
 import DGUtils from "../other/utility-functions.js";
 import DG from "../config.js";
+import {
+  tagRollDice,
+  colorsetForPercentileRoll,
+} from "../integrations/dice-so-nice.js";
 
 const { renderTemplate } = foundry.applications.handlebars;
 const { DialogV2 } = foundry.applications.api;
@@ -260,6 +264,8 @@ export class DGPercentileRoll extends DGRoll {
       game.modules.has("dice-so-nice") &&
       game.modules.get("dice-so-nice").active;
 
+    tagRollDice(this, colorsetForPercentileRoll(this));
+
     const label = this.createLabel();
 
     let resultString = "";
@@ -642,6 +648,8 @@ export class DGLethalityRoll extends DGPercentileRoll {
    * @override
    */
   async toChat() {
+    tagRollDice(this, "dg2-lethality");
+
     // Note: intentionally target + modifier, not effectiveTarget - a lethality
     // roll is a property of the weapon, so exhaustion penalties do not apply.
     const isLethal = this.total <= this.target + this.modifier;
@@ -741,6 +749,8 @@ export class DGDamageRoll extends DGRoll {
    * @override
    */
   async toChat() {
+    tagRollDice(this, "dg2-lethality");
+
     let label = this.formula;
     try {
       label = `${game.i18n.localize("DG.Roll.Rolling")} <b>${game.i18n
@@ -841,6 +851,8 @@ export class DGSanityDamageRoll extends DGRoll {
    * @override
    */
   async toChat() {
+    tagRollDice(this, "dg2-unnatural");
+
     const [lowDie, highDie] = this.terms[0].terms.map((formula) => {
       return Roll.parse(formula)[0] || { faces: parseInt(formula), number: 1 };
     });