参考自：http://blog.csdn.net/a497393102/article/details/10563791
首先要找到 Default.sublime-theme 文件， 点击 sublime的Preferences -> Borrows Packages -> Theme - Default -> Default.sublime-theme，用sublime编辑
找到以下代码
"class": "sidebar_tree",
"row_padding": [8, 3],
"indent": 12,
"indent_offset": 17,
"indent_top_level": false,
"layer0.tint": [30, 30, 30], // 这三位数即为控制侧边栏背景颜色的rgb值，根据需要更改即可
"layer0.opacity": 1.0,
"dark_content": false
{
"class": "sidebar_label",
"color": [150, 150, 150], // 控制字体颜色的rgb值，根据需要更改
"font.bold": false
// , "shadow_color": [250, 250, 250], "shadow_offset": [0, 0]
},
{
"class": "sidebar_container",
"layer0.tint": [10, 10, 10], // 控制分割线（编码区与侧边栏的交界线）的颜色
"layer0.opacity": 1.0,
"layer0.draw_center": false,
"layer0.inner_margin": [0, 0, 1, 0],
"content_margin": [0, 0, 1, 0]
},