diff --git a/src/PhpSpreadsheet/Style/Color.php b/src/PhpSpreadsheet/Style/Color.php
index 956efb9e..d308c5c7 100644
--- a/src/PhpSpreadsheet/Style/Color.php
+++ b/src/PhpSpreadsheet/Style/Color.php
@@ -397,7 +397,7 @@ class Color extends Supervisor
             return new self(self::$indexedColors[$colorIndex]);
         }
 
-        return ($background) ? new self(self::COLOR_WHITE): new self(self::COLOR_BLACK);
+        return ($background) ? new self(self::COLOR_WHITE) : new self(self::COLOR_BLACK);
     }
 
     /**
diff --git a/tests/PhpSpreadsheetTests/Style/ColorTest.php b/tests/PhpSpreadsheetTests/Style/ColorTest.php
index 0f1092bd..8ae6518a 100644
--- a/tests/PhpSpreadsheetTests/Style/ColorTest.php
+++ b/tests/PhpSpreadsheetTests/Style/ColorTest.php
@@ -7,14 +7,14 @@ use PHPUnit\Framework\TestCase;
 
 class ColorTest extends TestCase
 {
-    public function testNewColor()
+    public function testNewColor(): void
     {
         $color = new Color('FF123456');
         self::assertEquals('FF123456', $color->getARGB());
         self::assertEquals('123456', $color->getRGB());
     }
 
-    public function testARGBSetter()
+    public function testARGBSetter(): void
     {
         $color = new Color();
         $color->setARGB('80123456');
@@ -22,21 +22,21 @@ class ColorTest extends TestCase
         self::assertEquals('123456', $color->getRGB());
     }
 
-    public function testARGBSetterEmpty()
+    public function testARGBSetterEmpty(): void
     {
         $color = new Color();
         $color->setARGB();
         self::assertEquals(Color::COLOR_BLACK, $color->getARGB());
     }
 
-    public function testARGBSetterInvalid()
+    public function testARGBSetterInvalid(): void
     {
         $color = new Color('80123456');
         $color->setARGB('INVALID COLOR');
         self::assertEquals('80123456', $color->getARGB());
     }
 
-    public function testRGBSetter()
+    public function testRGBSetter(): void
     {
         $color = new Color();
         $color->setRGB('123456');
@@ -44,21 +44,21 @@ class ColorTest extends TestCase
         self::assertEquals('FF123456', $color->getARGB());
     }
 
-    public function testRGBSetterEmpty()
+    public function testRGBSetterEmpty(): void
     {
         $color = new Color();
         $color->setRGB();
         self::assertEquals(Color::COLOR_BLACK, $color->getARGB());
     }
 
-    public function testRGBSetterInvalid()
+    public function testRGBSetterInvalid(): void
     {
         $color = new Color('80123456');
         $color->setRGB('INVALID COLOR');
         self::assertEquals('123456', $color->getRGB());
     }
 
-    public function testARGBFromArray()
+    public function testARGBFromArray(): void
     {
         $color = new Color();
         $color->applyFromArray(['argb' => '80123456']);
@@ -66,7 +66,7 @@ class ColorTest extends TestCase
         self::assertEquals('123456', $color->getRGB());
     }
 
-    public function testRGBFromArray()
+    public function testRGBFromArray(): void
     {
         $color = new Color();
         $color->applyFromArray(['rgb' => '123456']);