diff --git a/src/PhpSpreadsheet/Style/Color.php b/src/PhpSpreadsheet/Style/Color.php
index 1cb141a8..534bcc9f 100644
--- a/src/PhpSpreadsheet/Style/Color.php
+++ b/src/PhpSpreadsheet/Style/Color.php
@@ -63,7 +63,7 @@ class Color extends Supervisor
 
         //    Initialise values
         if (!$isConditional) {
-            $this->argb = $this->validateColour($colorValue, self::VALIDATE_ARGB_SIZE) ? $colorValue : self::COLOR_BLACK;
+            $this->argb = $this->validateColor($colorValue, self::VALIDATE_ARGB_SIZE) ? $colorValue : self::COLOR_BLACK;
         }
     }
 
@@ -124,9 +124,9 @@ class Color extends Supervisor
         return $this;
     }
 
-    private function validateColour(string $colorValue, int $size): bool
+    private function validateColor(string $colorValue, int $size): bool
     {
-        return in_array(ucfirst($colorValue), self::NAMED_COLORS) ||
+        return in_array(ucfirst(strtolower($colorValue)), self::NAMED_COLORS) ||
             preg_match(sprintf(self::VALIDATE_COLOR_VALUE, $size), $colorValue);
     }
 
@@ -155,7 +155,7 @@ class Color extends Supervisor
     {
         if ($colorValue === '' || $colorValue === null) {
             $colorValue = self::COLOR_BLACK;
-        } elseif (!$this->validateColour($colorValue, self::VALIDATE_ARGB_SIZE)) {
+        } elseif (!$this->validateColor($colorValue, self::VALIDATE_ARGB_SIZE)) {
             return $this;
         }
 
@@ -194,7 +194,7 @@ class Color extends Supervisor
     {
         if ($colorValue === '' || $colorValue === null) {
             $colorValue = '000000';
-        } elseif (!$this->validateColour($colorValue, self::VALIDATE_RGB_SIZE)) {
+        } elseif (!$this->validateColor($colorValue, self::VALIDATE_RGB_SIZE)) {
             return $this;
         }
 
diff --git a/tests/PhpSpreadsheetTests/CommentTest.php b/tests/PhpSpreadsheetTests/CommentTest.php
new file mode 100644
index 00000000..3fd22854
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/CommentTest.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests;
+
+use PhpOffice\PhpSpreadsheet\Comment;
+use PhpOffice\PhpSpreadsheet\RichText\RichText;
+use PhpOffice\PhpSpreadsheet\Style\Alignment;
+use PhpOffice\PhpSpreadsheet\Style\Color;
+use PHPUnit\Framework\TestCase;
+
+class CommentTest extends TestCase
+{
+    public function testCreateComment()
+    {
+        $comment = new Comment();
+        self::assertEquals('Author', $comment->getAuthor());
+        self::assertEquals('96pt', $comment->getWidth());
+        self::assertEquals('59.25pt', $comment->getMarginLeft());
+        self::assertEquals('1.5pt', $comment->getMarginTop());
+        self::assertEquals('55.5pt', $comment->getHeight());
+        self::assertInstanceOf(Color::class, $comment->getFillColor());
+        self::assertEquals('FFFFFFE1', $comment->getFillColor()->getARGB());
+        self::assertInstanceOf(RichText::class, $comment->getText());
+        self::assertEquals(Alignment::HORIZONTAL_GENERAL, $comment->getAlignment());
+        self::assertFalse($comment->getVisible());
+    }
+
+    public function testSetAuthor()
+    {
+        $comment = new Comment();
+        $comment->setAuthor('Mark Baker');
+        self::assertEquals('Mark Baker', $comment->getAuthor());
+    }
+
+    public function testSetMarginLeft()
+    {
+        $comment = new Comment();
+        $comment->setMarginLeft('20pt');
+        self::assertEquals('20pt', $comment->getMarginLeft());
+    }
+
+    public function testSetMarginTop()
+    {
+        $comment = new Comment();
+        $comment->setMarginTop('2.5pt');
+        self::assertEquals('2.5pt', $comment->getMarginTop());
+    }
+
+    public function testSetWidth()
+    {
+        $comment = new Comment();
+        $comment->setWidth('120pt');
+        self::assertEquals('120pt', $comment->getWidth());
+    }
+
+    public function testSetHeight()
+    {
+        $comment = new Comment();
+        $comment->setHeight('60pt');
+        self::assertEquals('60pt', $comment->getHeight());
+    }
+
+    public function testSetFillColor()
+    {
+        $comment = new Comment();
+        $comment->setFillColor(new Color('RED'));
+        self::assertEquals('RED', $comment->getFillColor()->getARGB());
+    }
+
+    public function testSetAlignment()
+    {
+        $comment = new Comment();
+        $comment->setAlignment(Alignment::HORIZONTAL_CENTER);
+        self::assertEquals(Alignment::HORIZONTAL_CENTER, $comment->getAlignment());
+    }
+}