diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
index 98005b3..854dcc4 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
@@ -1888,8 +1888,15 @@ namespace JoyD.Windows.CS
                             g.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceOver;
                         }
                         else
-                        {                             
+                        {                              
                             // 普通绘制模式
+                            // 重新获取选中的温差图例颜色（因为之前的selectedColor变量超出了作用域）
+                            Color selectedColor = Color.White; // 默认颜色
+                            if (hasSelectedLegend && selectedRowIndex >= 0 && selectedRowIndex < tempDiffData.Count)
+                            {
+                                selectedColor = (Color)tempDiffData[selectedRowIndex]["color"];
+                            }
+                            
                             // 计算考虑图像缩放比例的画笔大小
                             int adjustedBrushSize = _currentBrushSize;
                             if (picBoxTemp.Image != null)