diff --git a/src/langs/fa.json b/src/langs/fa.json
index 3beec05..0bd6589 100644
--- a/src/langs/fa.json
+++ b/src/langs/fa.json
@@ -1024,6 +1024,7 @@
       "new_label": "برچسب جدید",
       "label_title": "عنوان",
       "choose_custom_color": "انتخاب رنگ دلخواه",
+      "select_cover_color": "انتخاب رنگ کاور",
       "members": "اعضا",
       "copy_from": "کپی از",
       "none": "هیچ کدام",
diff --git a/src/pages/taskmanager/components/Task.tsx b/src/pages/taskmanager/components/Task.tsx
index d4dc60e..69f060c 100644
--- a/src/pages/taskmanager/components/Task.tsx
+++ b/src/pages/taskmanager/components/Task.tsx
@@ -36,7 +36,7 @@ const Task: FC<Props> = ({ task, isDragging, onDragStart, onDragEnd, onClick })
         isDragging ? "opacity-40" : ""
       }`}
     >
-      <div className="h-10 bg-yellow-500 rounded-lg"></div>
+      {task.color ? <div className="h-10 rounded-lg" style={{ backgroundColor: task.color }} /> : null}
       <div className="bg-[#FF76C2] h-5 px-3 flex items-center mt-2 text-[10px] text-white rounded-md w-fit">
         {task.tag}
       </div>
diff --git a/src/pages/taskmanager/components/task-detail/TaskDetailHeader.tsx b/src/pages/taskmanager/components/task-detail/TaskDetailHeader.tsx
index 174bc38..ff7ac3b 100644
--- a/src/pages/taskmanager/components/task-detail/TaskDetailHeader.tsx
+++ b/src/pages/taskmanager/components/task-detail/TaskDetailHeader.tsx
@@ -1,15 +1,19 @@
 import { Popover, PopoverButton, PopoverPanel } from "@headlessui/react";
-import { ArrowDown2, CloseCircle } from "iconsax-react";
+import { ArrowDown2, CloseCircle, Paintbucket } from "iconsax-react";
 import { type FC } from "react";
 import TrashWithConfrim from "../../../../components/TrashWithConfrim";
 import { clx } from "../../../../helpers/utils";
 import type { Column } from "../../types";
+import TaskDetailCoverColorPopover from "./cover/TaskDetailCoverColorPopover";
 
 type Props = {
   columns: Column[];
   selectedPhaseId: string;
   onPhaseChange: (phaseId: string) => void;
   isChangingPhase?: boolean;
+  taskColor: string | null;
+  onColorSelect: (color: string) => void;
+  isUpdatingColor?: boolean;
   onClose: () => void;
   onDelete?: () => void;
   isDeleting?: boolean;
@@ -20,6 +24,9 @@ const TaskDetailHeader: FC<Props> = ({
   selectedPhaseId,
   onPhaseChange,
   isChangingPhase,
+  taskColor,
+  onColorSelect,
+  isUpdatingColor,
   onClose,
   onDelete,
   isDeleting,
@@ -65,6 +72,33 @@ const TaskDetailHeader: FC<Props> = ({
       </Popover>
 
       <div className="flex items-center gap-2">
+        <Popover className="relative">
+          {({ close }) => (
+            <>
+              <PopoverButton
+                disabled={isUpdatingColor}
+                className="size-8 rounded-full bg-white/60 flex items-center justify-center cursor-pointer disabled:opacity-50 outline-none"
+                aria-label="انتخاب رنگ کاور"
+              >
+                <Paintbucket size={18} color="#292D32" />
+              </PopoverButton>
+
+              <PopoverPanel
+                anchor="bottom end"
+                className="z-[80] mt-1 rounded-2xl bg-white shadow-md border border-border p-4"
+              >
+                <TaskDetailCoverColorPopover
+                  selectedColor={taskColor}
+                  onSelect={(color) => {
+                    onColorSelect(color);
+                    close();
+                  }}
+                />
+              </PopoverPanel>
+            </>
+          )}
+        </Popover>
+
         {onDelete ? (
           <div className="size-8 rounded-full bg-white/60 flex items-center justify-center">
             <TrashWithConfrim onDelete={onDelete} isLoading={isDeleting} color="#FF0000" />
diff --git a/src/pages/taskmanager/components/task-detail/TaskDetailModal.tsx b/src/pages/taskmanager/components/task-detail/TaskDetailModal.tsx
index 7fb4328..45ac920 100644
--- a/src/pages/taskmanager/components/task-detail/TaskDetailModal.tsx
+++ b/src/pages/taskmanager/components/task-detail/TaskDetailModal.tsx
@@ -9,6 +9,7 @@ import type { TaskDetailType } from "../../task/types/TaskTypes";
 import type { Column, Task } from "../../types";
 import AttachmentList from "./attachment/List";
 import CheckLists from "./checklist/List";
+import TaskDetailCoverColorBar from "./cover/TaskDetailCoverColorBar";
 import TaskDetailDescription from "./TaskDetailDescription";
 import TaskDetailHeader from "./TaskDetailHeader";
 import TaskDetailToolbar from "./TaskDetailToolbar";
@@ -28,6 +29,7 @@ const TaskDetailModal: FC<Props> = ({ open, task, columns, projectId, onClose, o
   const [activeTab, setActiveTab] = useState<TaskDetailTab | null>(null);
   const [title, setTitle] = useState("");
   const [description, setDescription] = useState("");
+  const [color, setColor] = useState<string | null>(null);
   const initialTitleRef = useRef("");
   const initialDescriptionRef = useRef("");
 
@@ -50,6 +52,7 @@ const TaskDetailModal: FC<Props> = ({ open, task, columns, projectId, onClose, o
       setActiveTab(null);
       setTitle("");
       setDescription("");
+      setColor(null);
       initialTitleRef.current = "";
       initialDescriptionRef.current = "";
     }
@@ -60,6 +63,7 @@ const TaskDetailModal: FC<Props> = ({ open, task, columns, projectId, onClose, o
 
     setTitle(taskDetail.title);
     setDescription(taskDetail.description ?? "");
+    setColor(taskDetail.color || null);
     initialTitleRef.current = taskDetail.title;
     initialDescriptionRef.current = taskDetail.description ?? "";
   }, [taskDetail]);
@@ -116,6 +120,24 @@ const TaskDetailModal: FC<Props> = ({ open, task, columns, projectId, onClose, o
     );
   };
 
+  const handleColorChange = (newColor: string | null) => {
+    const previousColor = color;
+    setColor(newColor);
+
+    updateTask.mutate(
+      { id: task.id, params: { color: newColor ?? "" } },
+      {
+        onSuccess: () => {
+          toast.success(t("success"));
+        },
+        onError: (error: ErrorType) => {
+          setColor(previousColor);
+          toast.error(error.response?.data?.error.message[0]);
+        },
+      },
+    );
+  };
+
   const handlePhaseChange = (taskPhaseId: string) => {
     if (taskPhaseId === selectedPhaseId) return;
 
@@ -144,11 +166,22 @@ const TaskDetailModal: FC<Props> = ({ open, task, columns, projectId, onClose, o
             selectedPhaseId={selectedPhaseId}
             onPhaseChange={handlePhaseChange}
             isChangingPhase={changeTaskPhase.isPending}
+            taskColor={color}
+            onColorSelect={(newColor) => handleColorChange(newColor)}
+            isUpdatingColor={updateTask.isPending}
             onClose={onClose}
             onDelete={handleDelete}
             isDeleting={deleteTask.isPending}
           />
 
+          {color ? (
+            <TaskDetailCoverColorBar
+              color={color}
+              onRemove={() => handleColorChange(null)}
+              isRemoving={updateTask.isPending}
+            />
+          ) : null}
+
           <input
             value={title}
             onChange={(e) => setTitle(e.target.value)}
diff --git a/src/pages/taskmanager/components/task-detail/cover/TaskDetailCoverColorBar.tsx b/src/pages/taskmanager/components/task-detail/cover/TaskDetailCoverColorBar.tsx
new file mode 100644
index 0000000..5206383
--- /dev/null
+++ b/src/pages/taskmanager/components/task-detail/cover/TaskDetailCoverColorBar.tsx
@@ -0,0 +1,27 @@
+import { Trash } from "iconsax-react";
+import { type FC } from "react";
+
+type Props = {
+  color: string;
+  onRemove: () => void;
+  isRemoving?: boolean;
+};
+
+const TaskDetailCoverColorBar: FC<Props> = ({ color, onRemove, isRemoving }) => {
+  return (
+    <div className="relative mt-4 -mx-1">
+      <div className="h-10 rounded-xl" style={{ backgroundColor: color }} />
+      <button
+        type="button"
+        onClick={onRemove}
+        disabled={isRemoving}
+        className="absolute bottom-1 left-2 size-7 rounded-full bg-white/80 flex items-center justify-center cursor-pointer disabled:opacity-50"
+        aria-label="حذف رنگ"
+      >
+        <Trash size={16} color="#292D32" />
+      </button>
+    </div>
+  );
+};
+
+export default TaskDetailCoverColorBar;
diff --git a/src/pages/taskmanager/components/task-detail/cover/TaskDetailCoverColorPopover.tsx b/src/pages/taskmanager/components/task-detail/cover/TaskDetailCoverColorPopover.tsx
new file mode 100644
index 0000000..386eab3
--- /dev/null
+++ b/src/pages/taskmanager/components/task-detail/cover/TaskDetailCoverColorPopover.tsx
@@ -0,0 +1,37 @@
+import { type FC } from "react";
+import { useTranslation } from "react-i18next";
+import { clx } from "../../../../../helpers/utils";
+import { TASK_COVER_COLORS } from "./constants";
+
+type Props = {
+  selectedColor: string | null;
+  onSelect: (color: string) => void;
+};
+
+const TaskDetailCoverColorPopover: FC<Props> = ({ selectedColor, onSelect }) => {
+  const { t } = useTranslation("global");
+
+  return (
+    <div className="w-[280px]">
+      <div className="text-xs font-medium mb-3 text-right">{t("taskmanager.task_detail.select_cover_color")}</div>
+      <div className="grid grid-cols-4 gap-2">
+        {TASK_COVER_COLORS.map((color) => (
+          <button
+            key={color}
+            type="button"
+            onClick={() => onSelect(color)}
+            className={clx(
+              "h-10 rounded-lg cursor-pointer transition-shadow",
+              color === "#D1D5DB" && "border border-[#B0B0B0]",
+              selectedColor === color && "ring-2 ring-black ring-offset-1",
+            )}
+            style={{ backgroundColor: color }}
+            aria-label={color}
+          />
+        ))}
+      </div>
+    </div>
+  );
+};
+
+export default TaskDetailCoverColorPopover;
diff --git a/src/pages/taskmanager/components/task-detail/cover/constants.ts b/src/pages/taskmanager/components/task-detail/cover/constants.ts
new file mode 100644
index 0000000..53c3d49
--- /dev/null
+++ b/src/pages/taskmanager/components/task-detail/cover/constants.ts
@@ -0,0 +1,10 @@
+export const TASK_COVER_COLORS = [
+  "#FF6B9D",
+  "#FF9F43",
+  "#6EE7B7",
+  "#60A5FA",
+  "#A78BFA",
+  "#EF4444",
+  "#D1D5DB",
+  "#FDE047",
+] as const;
diff --git a/src/pages/taskmanager/task/types/TaskTypes.ts b/src/pages/taskmanager/task/types/TaskTypes.ts
index 486942b..20ea861 100644
--- a/src/pages/taskmanager/task/types/TaskTypes.ts
+++ b/src/pages/taskmanager/task/types/TaskTypes.ts
@@ -14,6 +14,7 @@ export type TaskItemType = {
   order: number;
   tag?: string;
   dateRange?: string;
+  color?: string | null;
   attachments?: number;
   checklistDone?: number;
   checklistTotal?: number;
@@ -114,7 +115,7 @@ export type ChangeTaskPhaseType = {
 export type UpdateTaskType = Partial<
   Pick<TaskDetailType, "title" | "description" | "taskPhaseId" | "order" | "startDate" | "endDate">
 > & {
-  color?: string;
+  color?: string | null;
   userIds?: string[];
 };
 
diff --git a/src/pages/taskmanager/task/utils/mapTaskItemToTask.ts b/src/pages/taskmanager/task/utils/mapTaskItemToTask.ts
index c492813..2bc043f 100644
--- a/src/pages/taskmanager/task/utils/mapTaskItemToTask.ts
+++ b/src/pages/taskmanager/task/utils/mapTaskItemToTask.ts
@@ -8,6 +8,7 @@ export const mapTaskItemToTask = (task: TaskItemType, taskPhaseId: string, fallb
   title: task.title,
   tag: task.tag ?? "",
   dateRange: task.dateRange ?? "",
+  color: task.color || null,
   attachments: task.attachments ?? 0,
   checklistDone: task.checklistDone ?? 0,
   checklistTotal: task.checklistTotal ?? 0,
diff --git a/src/pages/taskmanager/types.ts b/src/pages/taskmanager/types.ts
index c528d95..50955cc 100644
--- a/src/pages/taskmanager/types.ts
+++ b/src/pages/taskmanager/types.ts
@@ -12,6 +12,7 @@ export type Task = {
   title: string;
   tag: string;
   dateRange: string;
+  color?: string | null;
   attachments: number;
   checklistDone: number;
   checklistTotal: number;