更新颜色时，还需要更新

When you update the color, you need to also update the source that autocomplete uses, like this:

function addColor() {
    //add colors
    $('#empf').autocomplete("option", { source: colors });
}

此处是一个演示示例，添加颜色并一次更新自动填充源第二.

Here's a sample demo doing this, adding a color and updating the autocomplete source once a second.