Administration: Ensure SVG icons in admin menus are correctly colored.

Props ryelle.
Fixes #50555.

git-svn-id: https://develop.svn.wordpress.org/trunk@48542 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/general-template.php

@@ -4430,11 +4430,11 @@ function register_admin_color_schemes() {
 		'modern',
 		_x( 'Modern', 'admin color scheme' ),
 		admin_url( "css/colors/modern/colors$suffix.css" ),
-		array( '#1e1e1e', '#3858e9', '#e26f56' ),
+		array( '#1e1e1e', '#3858e9', '#33f078' ),
 		array(
-			'base'    => '#1e1e1e',
-			'focus'   => '#3858e9',
-			'current' => '#e26f56',
+			'base'    => '#f3f1f1',
+			'focus'   => '#fff',
+			'current' => '#fff',
 		)
 	);