diff --git a/src/Helpers/Weight.php b/src/Helpers/Weight.php
index cad9954..9531056 100644
--- a/src/Helpers/Weight.php
+++ b/src/Helpers/Weight.php
@@ -6,6 +6,8 @@
 
 use DragonCode\WhichColor\Data\RGB;
 
+use function abs;
+
 class Weight
 {
     protected array $values = [
diff --git a/src/Services/Color.php b/src/Services/Color.php
index 3dcf82b..fe2e7e2 100644
--- a/src/Services/Color.php
+++ b/src/Services/Color.php
@@ -12,17 +12,17 @@ class Color
     /**
      * Coefficient / Number of mistakes / Count of items to check.
      *
-     * 0.00100   / 14%   / 125
-     * 0.00079   / 11%   / 125
-     * 0.00082   / 1.13% / 1331
-     * 0.00084   / 0.45% / 1331
-     * 0.000845  / 0.23% / 1331
-     * 0.00085   / 0.23% / 1331
-     * 0.00086   / 0.15% / 1331
-     * 0.00087   / 0.15% / 1331
-     * 0.00088   / 0.00% / 1331
-     * 0.00096   / 16%   / 125
-     * 0.00092   / 17%   / 125
+     * - 0.00100   / 14%   / 125
+     * - 0.00079   / 11%   / 125
+     * - 0.00082   / 1.13% / 1331
+     * - 0.00084   / 0.45% / 1331
+     * - 0.000845  / 0.23% / 1331
+     * - 0.00085   / 0.23% / 1331
+     * - 0.00086   / 0.15% / 1331
+     * - 0.00087   / 0.15% / 1331
+     * - 0.00088   / 0.00% / 1331
+     * - 0.00096   / 16%   / 125
+     * - 0.00092   / 17%   / 125
      */
     protected float $weight = 0.00088;
 
@@ -33,11 +33,9 @@ public function __construct(
         protected Converter $convert = new Converter
     ) {}
 
-    public function of(array|RGB|string|null $hex = null): self
+    public function of(array|RGB|string|null $hex = null): static
     {
-        $instance = new static;
-
-        return $instance->setHex($hex);
+        return (new static)->setHex($hex);
     }
 
     /**
@@ -56,7 +54,7 @@ public function lightIsBetter(): bool
         return ! $this->darkIsBetter();
     }
 
-    public function setHex(array|RGB|string|null $hex): self
+    public function setHex(array|RGB|string|null $hex): static
     {
         if ($hex) {
             $this->rgb = $this->parseHex($hex);
diff --git a/src/Services/Converter.php b/src/Services/Converter.php
index 2d90e0e..d1277c6 100644
--- a/src/Services/Converter.php
+++ b/src/Services/Converter.php
@@ -4,11 +4,18 @@
 
 namespace DragonCode\WhichColor\Services;
 
+use const STR_PAD_LEFT;
+
 use DragonCode\Support\Facades\Helpers\Arr;
 use DragonCode\Support\Facades\Helpers\Str;
 use DragonCode\Support\Facades\Instances\Instance;
 use DragonCode\WhichColor\Data\RGB;
-use ReflectionException;
+
+use function dechex;
+use function hexdec;
+use function is_string;
+use function str_pad;
+use function str_split;
 
 class Converter
 {
@@ -32,13 +39,11 @@ public function hex2rgb(array|RGB|string|null $hex = '#000000'): RGB
 
     /**
      * Convert RGB color to HEX code.
-     *
-     * @throws ReflectionException
      */
     public function rgb2hex(array|RGB $rgb = []): string
     {
         return Arr::of($this->hex2rgb($rgb)->toArray())
-            ->map(fn ($x) => str_pad(dechex($x), 2, '0', STR_PAD_LEFT))
+            ->map(static fn ($x) => str_pad(dechex($x), 2, '0', STR_PAD_LEFT))
             ->implode('')
             ->prepend('#')
             ->toString();
@@ -48,11 +53,11 @@ protected function parseString(string $hex): array
     {
         $hex = Str::after($hex, '#');
 
-        $is_short = Str::length($hex) === 3;
+        $short = Str::length($hex) === 3;
 
         return array_map(
-            fn ($x) => hexdec($is_short ? $x . $x : $x),
-            str_split($hex, $is_short ? 1 : 2)
+            static fn ($x) => hexdec($short ? $x . $x : $x),
+            str_split($hex, $short ? 1 : 2)
         );
     }