diff --git a/QA_IMPROVEMENTS_SUMMARY.md b/QA_IMPROVEMENTS_SUMMARY.md
new file mode 100644
index 0000000..1b7ed33
--- /dev/null
+++ b/QA_IMPROVEMENTS_SUMMARY.md
@@ -0,0 +1,51 @@
+# PHP Code Quality Improvements Summary
+
+## Task Completed Successfully
+
+### 1. Added ninjify/qa as Development Dependency
+- Added `ninjify/qa: *` to the `require-dev` section of `composer.json`
+- Successfully installed the package along with its dependencies:
+  - `php-parallel-lint/php-parallel-lint` (v1.4.0)
+  - `squizlabs/php_codesniffer` (3.13.2)
+  - `slevomat/coding-standard` (7.2.1)
+  - `ninjify/coding-standard` (v0.12.1)
+  - Other supporting packages
+
+### 2. Linting Analysis Performed
+- **PHP Syntax Check**: No syntax errors found in source code
+- **Code Standards Check**: Found 8 PSR12 violations across 2 files
+
+### 3. Code Quality Issues Fixed
+Applied PSR12 coding standard fixes to both source files:
+
+#### `src/Utils/Arrays.php` (4 fixes):
+- Added blank line after opening PHP tag
+- Removed blank line after class opening brace
+- Added newline at end of file
+- Fixed class closing brace placement
+
+#### `src/Utils/Colors.php` (4 fixes):
+- Added blank line after opening PHP tag
+- Changed `TRUE` to `true` (lowercase boolean)
+- Removed blank line at end of control structure
+- Added newline at end of file
+
+### 4. Business Logic Verification
+- **All tests pass**: 2 tests executed successfully (0.0 seconds)
+- **No functionality changes**: Only coding style improvements were made
+- **No breaking changes**: Business logic remains completely intact
+
+### 5. Final Quality Check
+- **Zero linting errors**: All PSR12 coding standard violations resolved
+- **Clean syntax**: No PHP syntax errors
+- **Comprehensive coverage**: Used professional quality assurance tools
+
+## Tools Used
+- `ninjify/qa` package for comprehensive code quality analysis
+- `php-parallel-lint` for syntax checking
+- `phpcs` (PHP CodeSniffer) for detecting coding standard violations
+- `phpcbf` (PHP Code Beautifier and Fixer) for automatic fixes
+- `nette/tester` for running unit tests
+
+## Result
+The aprila/utils project now adheres to PSR12 coding standards while maintaining full functionality and test coverage.
\ No newline at end of file
diff --git a/composer.json b/composer.json
index a79666f..aecb0bf 100644
--- a/composer.json
+++ b/composer.json
@@ -14,10 +14,16 @@
 		"php": ">=7.1.0"
 	},
 	"require-dev": {
-		"nette/tester": "~2.3"
+		"nette/tester": "~2.3",
+		"ninjify/qa": "*"
 	},
 	"autoload": {
 		"classmap": ["src"]
 	},
-	"minimum-stability": "stable"
+	"minimum-stability": "stable",
+	"config": {
+		"allow-plugins": {
+			"dealerdirect/phpcodesniffer-composer-installer": true
+		}
+	}
 }
diff --git a/composer.phar b/composer.phar
new file mode 100755
index 0000000..bb6ba64
Binary files /dev/null and b/composer.phar differ
diff --git a/src/Utils/Arrays.php b/src/Utils/Arrays.php
index 9e1e7a6..091640e 100644
--- a/src/Utils/Arrays.php
+++ b/src/Utils/Arrays.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * @author Honza Cerny (http://honzacerny.com)
  */
@@ -9,7 +10,6 @@
 
 class Arrays
 {
-
     final public function __construct()
     {
         throw new LogicException("Static class - cannot be instantiated");
@@ -108,5 +108,4 @@ public static function getPreviousValue(&$array, $curr_val)
 
         return $prev;
     }
-
-}
\ No newline at end of file
+}
diff --git a/src/Utils/Colors.php b/src/Utils/Colors.php
index 5d1d43d..a1559c6 100644
--- a/src/Utils/Colors.php
+++ b/src/Utils/Colors.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * @author Honza Cerny (http://honzacerny.com)
  */
@@ -15,7 +16,7 @@ class Colors
      *
      * @return string
      */
-    public static function rgbToHex($rgb, $withHash = TRUE)
+    public static function rgbToHex($rgb, $withHash = true)
     {
         if (is_string($rgb)) {
             $rgbString = $rgb;
@@ -54,9 +55,8 @@ public static function rgbToHex($rgb, $withHash = TRUE)
 
         if ($withHash) {
             return strtoupper('#' . sprintf("%02s%02s%02s", $hex[0], $hex[1], $hex[2]));
-
         } else {
             return strtoupper(sprintf("%02s%02s%02s", $hex[0], $hex[1], $hex[2]));
         }
     }
-}
\ No newline at end of file
+}