el-button 根据数据动态赋背景颜色

需求：根据提供的数据，动态给每一个树节点后面的button赋背景颜色

<el-tree 
:data="layertreeData1" node-key="id" 
show-checkbox 
:props="layerdefaultProps"
:check-on-click-node="true">
<span class="custom-tree-node" slot-scope="{ node }">
<span>{{ node.data.name }}</span>
<span class="layerlegend"> 
<el-button
 circle
 disabled 
:style="{ 'background-color': node.data.paint['fill-color'] }">
</el-button>
</span></span>
</el-tree>

layertreeData1: [{
				id: "1",
				name: "test1",
				paint: {
					"fill-color": "rgba(41, 106, 9, 1)",
					"fill-outline-color": "rgba(223, 230, 230, 1)",
				}}，
{
				id: "2",
				name: "test2",
				paint: {
					"fill-color": "rgba(100, 150, 59, 1)",
					"fill-outline-color": "rgba(223, 230, 230, 1)",
				}}]