如图：

首先打开齿轮，打开设置

搜索workbench.colorCustomizations

编辑setting.json

修改setting.json内内容

"workbench.colorCustomizations": {
"statusBar.foreground": "#FFFFFF",
"statusBar.background": "#800080",
"statusBar.noFolderBackground": "#800080",
"statusBar.debuggingBackground": "#800080"
}