diff --git a/tests/phpunit/tests/admin/includes/misc/wpColorSchemeSettings.php b/tests/phpunit/tests/admin/includes/misc/wpColorSchemeSettings.php
new file mode 100644
index 0000000000000..dd1969d620b31
--- /dev/null
+++ b/tests/phpunit/tests/admin/includes/misc/wpColorSchemeSettings.php
@@ -0,0 +1,128 @@
+<?php
+/**
+ * Test wp_color_scheme_settings().
+ *
+ * @group admin
+ * @group misc
+ */
+class Tests_wp_color_scheme_settings extends WP_UnitTestCase {
+
+	/**
+	 * Original $_wp_admin_css_colors global.
+	 *
+	 * @var array
+	 */
+	private $orig_wp_admin_css_colors;
+
+	public function set_up() {
+		parent::set_up();
+		global $_wp_admin_css_colors;
+		$this->orig_wp_admin_css_colors = $_wp_admin_css_colors;
+	}
+
+	public function tear_down() {
+		global $_wp_admin_css_colors;
+		$_wp_admin_css_colors = $this->orig_wp_admin_css_colors;
+		parent::tear_down();
+	}
+
+	/**
+	 * Test wp_color_scheme_settings() with a valid color scheme.
+	 */
+	public function test_wp_color_scheme_settings_valid_scheme() {
+		global $_wp_admin_css_colors;
+
+		$user_id = $this->factory->user->create( array( 'role' => 'administrator' ) );
+		wp_set_current_user( $user_id );
+		update_user_option( $user_id, 'admin_color', 'blue' );
+
+		$_wp_admin_css_colors = array(
+			'blue' => (object) array(
+				'icon_colors' => array(
+					'base'    => '#e5f8ff',
+					'focus'   => '#fff',
+					'current' => '#fff',
+				),
+			),
+		);
+
+		ob_start();
+		wp_color_scheme_settings();
+		$output = ob_get_clean();
+
+		$expected = array(
+			'icons' => array(
+				'base'    => '#e5f8ff',
+				'focus'   => '#fff',
+				'current' => '#fff',
+			),
+		);
+
+		$this->assertStringContainsString( 'var _wpColorScheme = ' . wp_json_encode( $expected ), $output );
+	}
+
+	/**
+	 * Test wp_color_scheme_settings() with an invalid color scheme (fallback to modern).
+	 */
+	public function test_wp_color_scheme_settings_invalid_scheme_fallback_to_modern() {
+		global $_wp_admin_css_colors;
+
+		$user_id = $this->factory->user->create( array( 'role' => 'administrator' ) );
+		wp_set_current_user( $user_id );
+		update_user_option( $user_id, 'admin_color', 'non-existent' );
+
+		$_wp_admin_css_colors = array(
+			'modern' => (object) array(
+				'icon_colors' => array(
+					'base'    => '#f0f0f1',
+					'focus'   => '#fff',
+					'current' => '#fff',
+				),
+			),
+		);
+
+		ob_start();
+		wp_color_scheme_settings();
+		$output = ob_get_clean();
+
+		$expected = array(
+			'icons' => array(
+				'base'    => '#f0f0f1',
+				'focus'   => '#fff',
+				'current' => '#fff',
+			),
+		);
+
+		$this->assertStringContainsString( 'var _wpColorScheme = ' . wp_json_encode( $expected ), $output );
+	}
+
+	/**
+	 * Test wp_color_scheme_settings() with no icon colors defined (fallback to defaults).
+	 */
+	public function test_wp_color_scheme_settings_no_icon_colors_fallback() {
+		global $_wp_admin_css_colors;
+
+		$user_id = $this->factory->user->create( array( 'role' => 'administrator' ) );
+		wp_set_current_user( $user_id );
+		update_user_option( $user_id, 'admin_color', 'empty-scheme' );
+
+		$_wp_admin_css_colors = array(
+			'empty-scheme' => (object) array(),
+			'modern'       => (object) array(),
+		);
+
+		ob_start();
+		wp_color_scheme_settings();
+		$output = ob_get_clean();
+
+		$expected = array(
+			'icons' => array(
+				'base'    => '#a7aaad',
+				'focus'   => '#72aee6',
+				'current' => '#fff',
+			),
+		);
+
+		$this->assertStringContainsString( 'var _wpColorScheme = ' . wp_json_encode( $expected ), $output );
+	}
+}