WordPress后台管理界面采用流行的扁平化UI设计，后台–用户–我的个人资料页面，默认提供了八种管理界面配色方案供用户选择，但选来选去总是觉得不符合自己的心意，万能的WordPress也考虑到了这点，已为我们预设了添加自定义配色的函数。
该函数位于/wp-includes/general-template.php文件第3839行：
Allows a plugin to register a new admin colour scheme. For example:
wp_admin_css_color( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’classic\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’Classic\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ), admin_url( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”css/colors-classic.css\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” ), array(
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#07273E\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#14568A\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#D54E21\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#2683AE\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’
) );
有了现成的函数下面就好办了。
第一步，在当前主题中新建名称为css文件夹，复制一份wordpress\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\wp-admin\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\css\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\colors目录任意文件夹中的colors.css到这个css文件夹中。
第二步，将下面的代码添加到当前主题functions.php中：
// 添加后台配色
wp_admin_css_color(
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’my_css\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, __( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’新的配色\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ), // 文字可以修改
get_template_directory_uri() . \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’/css/colors.css\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
array( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#21252e\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#2f3541\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#3078ab\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#3690cf\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ ),
array( \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’base\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#e5f8ff\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’focus\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#fff\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’current\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’#fff\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ )
);
第三步，修改colors.css中的颜色值，为你喜欢的即可。
需要注意的是，在修改样式过程中，要随时清空浏览器缓存才能看到修改的效果。
以此类推，可以添加多个自定义配色方案。
利用上面的方法理论上可以修改后台任意样式，包括通过display: none隐藏一些不需要的功能等。
添加后的效果：