diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 00000000..09a9fd89
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,14 @@
+# editorconfig.org
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.php]
+indent_size = 4
diff --git a/.gitattributes b/.gitattributes
index a978f604..4ca696b8 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,11 +1,13 @@
 * text=auto
 
-/.github export-ignore
-/tests export-ignore
-/.github export-ignore
-/.gitattributes export-ignore
-/.gitignore export-ignore
-/phpunit.xml export-ignore
-/phpunit.xml.dist export-ignore
+/.editorconfig      export-ignore
+/.github            export-ignore
+/tests              export-ignore
+/.github            export-ignore
+/.gitattributes     export-ignore
+/.gitignore         export-ignore
+/phpcs.xml          export-ignore
+/phpunit.xml        export-ignore
+/phpunit.xml.dist   export-ignore
 /docker-compose.yml export-ignore
-/Dockerfile export-ignore
+/Dockerfile         export-ignore
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index c33fcdef..817190e4 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -100,3 +100,6 @@ jobs:
 
       - name: Run analyzer
         run: vendor/bin/phpstan analyze --level=4 ./src
+
+      - name: Validate coding standards
+        run: vendor/bin/phpcs
diff --git a/composer.json b/composer.json
index 1f864429..edaf37a5 100644
--- a/composer.json
+++ b/composer.json
@@ -1,38 +1,45 @@
 {
-    "name": "intervention/image",
-    "description": "PHP image manipulation",
-    "homepage": "https://image.intervention.io/",
-    "keywords": ["image", "gd", "imagick", "watermark", "thumbnail", "resize"],
-    "license": "MIT",
-    "authors": [
-        {
-            "name": "Oliver Vogel",
-            "email": "oliver@intervention.io",
-            "homepage": "https://intervention.io/"
-        }
-    ],
-    "require": {
-        "php": "^8.1",
-        "ext-mbstring": "*",
-        "intervention/gif": "^4"
-    },
-    "require-dev": {
-        "phpunit/phpunit": "^9",
-        "mockery/mockery": "^1.6",
-        "phpstan/phpstan": "^1"
-    },
-    "suggest": {
-        "ext-exif": "Recommended to be able to read EXIF data properly."
-
-    },
-    "autoload": {
-        "psr-4": {
-            "Intervention\\Image\\": "src"
-        }
-    },
-    "autoload-dev": {
-        "psr-4": {
-            "Intervention\\Image\\Tests\\": "tests"
-        }
+  "name": "intervention/image",
+  "description": "PHP image manipulation",
+  "homepage": "https://image.intervention.io/",
+  "keywords": [
+    "image",
+    "gd",
+    "imagick",
+    "watermark",
+    "thumbnail",
+    "resize"
+  ],
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "Oliver Vogel",
+      "email": "oliver@intervention.io",
+      "homepage": "https://intervention.io/"
     }
+  ],
+  "require": {
+    "php": "^8.1",
+    "ext-mbstring": "*",
+    "intervention/gif": "^4"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "^9",
+    "mockery/mockery": "^1.6",
+    "phpstan/phpstan": "^1",
+    "squizlabs/php_codesniffer": "^3.8"
+  },
+  "suggest": {
+    "ext-exif": "Recommended to be able to read EXIF data properly."
+  },
+  "autoload": {
+    "psr-4": {
+      "Intervention\\Image\\": "src"
+    }
+  },
+  "autoload-dev": {
+    "psr-4": {
+      "Intervention\\Image\\Tests\\": "tests"
+    }
+  }
 }
diff --git a/docker-compose.yml b/docker-compose.yml
index 890602f0..fa749c11 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,6 +1,6 @@
 version: '3'
 
-services: 
+services:
   tests:
     build: ./
     working_dir: /project
@@ -21,3 +21,9 @@ services:
     command: bash -c "composer install && ./vendor/bin/phpstan analyze --memory-limit=512M --level=4 ./src"
     volumes:
       - ./:/project
+  standards:
+    build: ./
+    working_dir: /project
+    command: bash -c "composer install && ./vendor/bin/phpcs"
+    volumes:
+      - ./:/project
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
index 00000000..a6ca5c01
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0"?>
+<ruleset name="Intervention/image">
+
+  <rule ref="PSR12"/>
+
+  <file>src/</file>
+  <file>tests/</file>
+</ruleset>
diff --git a/src/Colors/Rgb/Decoders/StringColorDecoder.php b/src/Colors/Rgb/Decoders/StringColorDecoder.php
index 559fc359..c2b53604 100644
--- a/src/Colors/Rgb/Decoders/StringColorDecoder.php
+++ b/src/Colors/Rgb/Decoders/StringColorDecoder.php
@@ -21,11 +21,12 @@ class StringColorDecoder extends AbstractDecoder implements DecoderInterface
      */
     public function decode(mixed $input): ImageInterface|ColorInterface
     {
-        if (! is_string($input)) {
+        if (!is_string($input)) {
             throw new DecoderException('Unable to decode input');
         }
 
-        $pattern = '/^s?rgba?\((?P<r>[0-9\.]+%?), ?(?P<g>[0-9\.]+%?), ?(?P<b>[0-9\.]+%?)(?:, ?(?P<a>(?:1)|(?:1\.0*)|(?:0)|(?:0?\.\d+%?)|(?:\d{1,3}%)))?\)$/i';
+        $pattern = '/^s?rgba?\((?P<r>[0-9\.]+%?), ?(?P<g>[0-9\.]+%?), ?(?P<b>[0-9\.]+%?)' .
+            '(?:, ?(?P<a>(?:1)|(?:1\.0*)|(?:0)|(?:0?\.\d+%?)|(?:\d{1,3}%)))?\)$/i';
         if (preg_match($pattern, $input, $matches) != 1) {
             throw new DecoderException('Unable to decode input');
         }
diff --git a/tests/Drivers/Gd/InputHandlerTest.php b/tests/Drivers/Gd/InputHandlerTest.php
index be376803..664e337b 100644
--- a/tests/Drivers/Gd/InputHandlerTest.php
+++ b/tests/Drivers/Gd/InputHandlerTest.php
@@ -61,7 +61,8 @@ class GdInputHandlerTest extends TestCase
     public function testHandleDataUriImage(): void
     {
         $handler = new InputHandler();
-        $input = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==';
+        $input = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNb' .
+            'yblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==';
         $result = $handler->handle($input);
         $this->assertInstanceOf(Image::class, $result);
     }
diff --git a/tests/Drivers/Imagick/InputHandlerTest.php b/tests/Drivers/Imagick/InputHandlerTest.php
index c2ee6f10..79e3de18 100644
--- a/tests/Drivers/Imagick/InputHandlerTest.php
+++ b/tests/Drivers/Imagick/InputHandlerTest.php
@@ -61,7 +61,8 @@ class InputHandlerTest extends TestCase
     public function testHandleDataUriImage(): void
     {
         $handler = new InputHandler();
-        $input = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==';
+        $input = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACN' .
+            'byblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==';
         $result = $handler->handle($input);
         $this->assertInstanceOf(Image::class, $result);
     }