diff --git a/src/modules/warehouse-label.ts b/src/modules/warehouse-label.ts
index f4b9004..fb2f1d2 100644
--- a/src/modules/warehouse-label.ts
+++ b/src/modules/warehouse-label.ts
@@ -13,5 +13,8 @@ export interface WarehouseLabel {
   color: string;
 }
 
+/** 預設標籤顏色（未設定顏色時使用） */
+export const DEFAULT_LABEL_COLOR = "#4a9eea";
+
 /** 依倉庫查詢標籤設定 */
 export const getLabel = (warehouseId: string): WarehouseLabel | null => null;