diff --git a/docs/api/Graph.en.md b/docs/api/Graph.en.md
index 72f2f2d6b7..1b17552c56 100644
--- a/docs/api/Graph.en.md
+++ b/docs/api/Graph.en.md
@@ -1498,7 +1498,7 @@ where the `imageConfig` is the configuration for exported image:
 
 ```javascript
 graph.downloadFullImage('tree-graph', {
-  backgroundColor: '#ccc',
+  backgroundColor: '#ddd',
   padding: [30, 15, 15, 15]
 });
 ```
diff --git a/docs/api/Graph.zh.md b/docs/api/Graph.zh.md
index d1babc84d6..9ad9b0d6ef 100644
--- a/docs/api/Graph.zh.md
+++ b/docs/api/Graph.zh.md
@@ -1499,7 +1499,7 @@ graph.set('nodeIdList', [1, 3, 5]);
 
 ```javascript
 graph.downloadFullImage('tree-graph', {
-  backgroundColor: '#ccc',
+  backgroundColor: '#ddd',
   padding: [30, 15, 15, 15]
 });
 ```