wp-includes/general-template.php:5120Registers the default admin color schemes.
function register_admin_color_schemes() { $suffix = is_rtl() ? '-rtl' : ''; $suffix .= SCRIPT_DEBUG ? '' : '.min'; wp_admin_css_color( 'modern', _x( 'Default', 'admin color scheme' ), admin_url( "css/colors/modern/colors$suffix.css" ), array( '#1e1e1e', '#3858e9', '#7b90ff' ), array( 'base' => '#f3f1f1', 'focus' => '#fff', 'current' => '#fff', ) ); wp_admin_css_color( 'fresh', _x( 'Fresh', 'admin color scheme' ), false, array( '#1d2327', '#2c3338', '#2271b1', '#72aee6' ), array( 'base' => '#a7aaad', 'focus' => '#72aee6', 'current' => '#fff', ) ); wp_admin_css_color( 'light', _x( 'Light', 'admin color scheme' ), admin_url( "css/colors/light/colors$suffix.css" ), array( '#e5e5e5', '#6a6a6a', '#c64606', '#007cba' ), array( 'base' => '#999', 'focus' => '#ccc', 'current' => '#ccc', ) ); wp_admin_css_color( 'blue', _x( 'Blue', 'admin color scheme' ), admin_url( "css/colors/blue/colors$suffix.css" ), array( '#183751', '#245278', '#437aa8', '#e1a948' ), array( 'base' => '#e5f8ff', 'focus' => '#fff', 'current' => '#fff', ) ); wp_admin_css_color( 'midnight', _x( 'Midnight', 'admin color scheme' ), admin_url( "css/colors/midnight/colors$suffix.css" ), array( '#232a2e', '#333c42', '#69a8bb', '#cf4339' ), array( 'base' => '#f1f2f3', 'focus' => '#fff', 'current' => '#fff', ) ); wp_admin_css_color( 'sunrise', _x( 'Sunrise', 'admin color scheme' ), admin_url( "css/colors/sunrise/colors$suffix.css" ), array( '#6f2724', '#8a312d', '#ad631e', '#ccaf0b' ), array( 'base' => '#f3f1f1', 'focus' => '#fff', 'current' => '#fff', ) ); wp_admin_css_color( 'ectoplasm', _x( 'Ectoplasm', 'admin color scheme' ), admin_url( "css/colors/ectoplasm/colors$suffix.css" ),Introduced in 3.0.0. Unchanged from 6.7.7 through 7.1.0.
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src/wp-includes/general-template.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.