How to fill background color of a node

I would like to fill node background with another color other than white, however seems like not able to. Here is what I did.
```
this.setState({ treeData })}
canDrag = {false}
getNodeKey = {({node})=> node.id}
generateNodeProps={(({ node, path, treeIndex}) => {
return ({
title: (

),})}}
/>
```

and this is how it looks. (I want color fill all the node background)

Please let me know how to resolve it.

thank you so much.