diff --git a/src/Model/BadgePalette.php b/src/Model/BadgePalette.php
index 3169dfb..f021dd2 100644
--- a/src/Model/BadgePalette.php
+++ b/src/Model/BadgePalette.php
@@ -15,5 +15,7 @@ final readonly class BadgePalette
      * @param string $backgroundColourClass Background colour Tailwind class
      */
     public function __construct(public string $textColourClass, public string $borderColourClass, public string $backgroundColourClass)
-    {}
+    {
+    }
 }
+
diff --git a/src/Twig/Component/Badge.php b/src/Twig/Component/Badge.php
index 715d9f1..d152755 100644
--- a/src/Twig/Component/Badge.php
+++ b/src/Twig/Component/Badge.php
@@ -9,7 +9,7 @@ use Pcm\BadgeBundle\Interface\BadgeableInterface;
 use Symfony\UX\TwigComponent\Attribute\AsTwigComponent;
 use TailwindMerge\TailwindMerge;
 
-#[AsTwigComponent(name: 'Pcm:Badge', template: "@PcmBadge/Badge.html.twig")]
+#[AsTwigComponent(name: 'Pcm:Badge', template: '@PcmBadge/Badge.html.twig')]
 final class Badge
 {
     public string $finalClasses;
@@ -19,21 +19,21 @@ final class Badge
     }
 
     /**
-     * @param ?BadgeableInterface $obj The object to be converted into a badge.
+     * @param ?BadgeableInterface $obj the object to be converted into a badge
      * @param ?string $class           Extra classes to add to the badge element.
      *                                 These will override the base classes in case
      *                                 of conflicts.
-     * @param ?string $colour          Specify the colour of an objectless badge.
-     * @param bool $outline            If the badge should be rendered as an outline.
+     * @param ?string $colour          specify the colour of an objectless badge
+     * @param bool $outline            if the badge should be rendered as an outline
      */
-    public function mount(?BadgeableInterface $obj = null, ?string $class = null, string $colour = null, bool $outline = false): void
+    public function mount(?BadgeableInterface $obj = null, ?string $class = null, ?string $colour = null, bool $outline = false): void
     {
         if (!$obj && !$colour) {
-            throw new \RuntimeException(sprintf("You must specify either a colour an instance of \"%s\".", BadgeableInterface::class));
+            throw new \RuntimeException(sprintf('You must specify either a colour an instance of "%s".', BadgeableInterface::class));
         }
 
         if ($obj && $colour) {
-            throw new \RuntimeException(sprintf("You have specified both the colour \"%s\" and an instance of \"%s\". Please use one or the other.", $colour, $obj::class));
+            throw new \RuntimeException(sprintf('You have specified both the colour "%s" and an instance of "%s". Please use one or the other.', $colour, $obj::class));
         }
 
         if ($obj) {
@@ -41,14 +41,14 @@ final class Badge
         }
 
         if ($colour) {
-            $cases = array_map(fn(EnumBadge $b) => strtolower($b->name), EnumBadge::cases());
+            $cases = array_map(fn (EnumBadge $b) => strtolower($b->name), EnumBadge::cases());
 
             if (!in_array($colour, $cases)) {
-                $formattedCases = implode(", ", array_map(fn(string $s) => '"'.$s.'"', $cases));
+                $formattedCases = implode(', ', array_map(fn (string $s) => '"'.$s.'"', $cases));
                 throw new \RuntimeException(sprintf('"%s" is not a valid Badge colour. Available options are: %s', $colour, $formattedCases));
             }
 
-            $colour = strtoupper($colour);
+            $colour  = strtoupper($colour);
             $palette = EnumBadge::{$colour}->getPalette();
         }