diff --git a/core/tests/Drupal/Tests/Core/Utility/ColorTest.php b/core/tests/Drupal/Tests/Core/Utility/ColorTest.php
index d86fc3a..b2ef138 100644
--- a/core/tests/Drupal/Tests/Core/Utility/ColorTest.php
+++ b/core/tests/Drupal/Tests/Core/Utility/ColorTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\Tests\Core\Utility\ColorTest.
+ * Contains \Drupal\Tests\Core\Utility\ColorTest.
  */
 
 namespace Drupal\Tests\Core\Utility;
@@ -26,6 +26,13 @@ public static function getInfo() {
   /**
    * Tests Color::hexToRgb().
    *
+   * @param string $value
+   *   The hex color value.
+   * @param string $expected
+   *   The expected rgb color value.
+   * @param bool $invalid
+   *   Whether this value is invalid and exception should be expected.
+   *
    * @dataProvider providerTestHexToRgb
    */
   public function testHexToRgb($value, $expected, $invalid = FALSE) {
@@ -41,7 +48,7 @@ public function testHexToRgb($value, $expected, $invalid = FALSE) {
    * @see testHexToRgb()
    *
    * @return array
-   *   An array containing:
+   *   An array of arrays containing:
    *     - The hex color value.
    *     - The rgb color array value.
    *     - (optional) Boolean indicating invalid status. Defaults to FALSE.
@@ -82,6 +89,11 @@ public function providerTestHexToRgb() {
   /**
    * Tests Color::rgbToHex().
    *
+   * @param string $value
+   *   The rgb color value.
+   * @param string $expected
+   *   The expected hex color value.
+   *
    * @dataProvider providerTestRbgToHex
    */
   public function testRgbToHex($value, $expected) {
@@ -94,7 +106,7 @@ public function testRgbToHex($value, $expected) {
    * @see testRgbToHex()
    *
    * @return array
-   *   An array containing:
+   *   An array of arrays containing:
    *     - The rgb color array value.
    *     - The hex color value.
    */