diff --git a/app/services/rainfall_grid_service.py b/app/services/rainfall_grid_service.py
index 13c4f97..529adfe 100644
--- a/app/services/rainfall_grid_service.py
+++ b/app/services/rainfall_grid_service.py
@@ -32,13 +32,13 @@ class RainfallGridService:
         self.rainfall_levels = {
             'levels': [0, 0.1, 5, 15, 30, 70, 140],
             'colors': [
-                (255, 255, 255, 0),      # 无雨 - 透明
-                (176, 224, 230, 255),    # 小雨 (0.1-5mm) - 淡蓝色
-                (70, 130, 180, 255),     # 中雨 (5-15mm) - 钢蓝色
-                (0, 0, 255, 255),        # 大雨 (15-30mm) - 蓝色
-                (0, 255, 0, 255),        # 暴雨 (30-70mm) - 绿色
-                (255, 255, 0, 255),      # 大暴雨 (70-140mm) - 黄色
-                (255, 0, 0, 255),      # 特大暴雨 (140m+) - 红色
+                (200, 200, 200, 0),      # 无雨
+                (0, 0, 255, 0.4 * 255),    # 小雨 (0.1-5mm)
+                (0, 255, 255, 0.5 * 255),     # 中雨 (5-15mm)
+                (0, 255, 0, 0.89 * 255),        # 大雨 (15-30mm)
+                (255, 255, 0, 0.7 * 255),        # 暴雨 (30-70mm)
+                (255, 165, 0, 0.8 * 255),      # 大暴雨 (70-140mm)
+                (255, 0, 0, 0.9 * 255),      # 特大暴雨 (140m+)
             ],
             'labels': ['无雨', '小雨', '中雨', '大雨', '暴雨', '大暴雨', '特大暴雨']
         }