如果是要设置柱子所在整个坐标的背景色,通过"tooltip.axisPointer.shadowStyle.color" (https://link.segmentfault.com/?enc=8XxCTUXxuJ9dwHqY4UNcqA%3D%3D.QAZyHiWSbRpA7umhh%2F6dSy8F5LbRztdGZok6jAmkd3ROaQe6xST3tAtCgNFEuGKatpj82%2FwbcXkcPsxZKqa6Kt5YRyBd1jkdQqTeCTegZHE%3D)进行设置
如果只是在悬停时设置柱子的颜色,通过"series-bar.emphasis.itemStyle.color" (https://link.segmentfault.com/?enc=vWriA3uoD2etwsOaVtaD2g%3D%3D.PDT5qKaxXeMAzF81duSmJYcMxwp6i63IsAgfkCDcTabad%2BAodYZ4%2BJs3wGB5%2BrYYuySllKZRHO4BRCA0bY%2Bps%2BNuCMLnPp58jErMePowTYA%3D)进行设置