diff --git a/README.md b/README.md
index 553ba74..4703fe3 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,8 @@ $ phpmnd wordpress --ignore-numbers=2,-1 --ignore-funcs=round,sleep --exclude=te
 
 The ``--allow-array-mapping`` option allow keys as strings when using "array" extension.
 
+The ``--colour`` option forces colour to be used in the output. ``--no-colour`` disables colour. The default is on unless output is not a TTY or running under CI
+
 The ``--exclude-file`` option will exclude a file from the code analysis. Multiple values are allowed.
 
 The ``--exclude-path`` option will exclude a path, which must be relative to the source, from the code analysis. Multiple values are allowed.
diff --git a/src/Command/RunCommand.php b/src/Command/RunCommand.php
index 4a6a024..63b71d2 100644
--- a/src/Command/RunCommand.php
+++ b/src/Command/RunCommand.php
@@ -143,6 +143,13 @@ protected function configure(): void
                 'Link to a file containing filenames to search',
                 ''
             )
+            ->addOption(
+                'colour',
+                null,
+                InputOption::VALUE_NEGATABLE,
+                'Show colours in the output',
+                ''
+            )
         ;
     }
 
@@ -161,11 +168,20 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             $progressBar = new ProgressBar($output, $finder->count());
             $progressBar->start();
         }
+        $colourRequested = $input->getOption('colour');
+        $outputDecorator = new Printer\Colour();
+
+        if ($colourRequested === false || ($colourRequested === '' && $this->shouldDefaultToPlain())) {
+            $outputDecorator = new Printer\Plain();
+        }
 
         $hintList = new HintList();
         $detector = new Detector($this->createOption($input), $hintList);
 
         $fileReportList = new FileReportList();
+
+        $printer = new Printer\Console($outputDecorator);
+
         $whitelist = $this->getFileOption($input->getOption('whitelist'));
 
         foreach ($finder as $file) {
@@ -304,4 +320,32 @@ private function getResourceUsage()
         // php-timer ^2.0||^3.0
         return Timer::resourceUsage();
     }
+
+    /**
+     * Defaults on plain output when the output is not a tty OR
+     * running under CI.
+     */
+    private function shouldDefaultToPlain()
+    {
+        $ciChecks = [
+            'CI',
+            'BUILD_NUMBER',
+            'RUN_ID',
+        ];
+
+        foreach ($ciChecks as $check) {
+            if (getenv($check)) {
+                return true;
+            }
+        }
+
+        if (function_exists('stream_isatty') && !stream_isatty(STDOUT)) {
+            return true;
+        }
+        if (function_exists('posix_isatty') && !posix_isatty(STDOUT)) {
+            return true;
+        }
+
+        return false;
+    }
 }
diff --git a/src/Printer/Colour.php b/src/Printer/Colour.php
new file mode 100644
index 0000000..2f3f604
--- /dev/null
+++ b/src/Printer/Colour.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace Povils\PHPMND\Printer;
+
+use JakubOnderka\PhpConsoleColor\ConsoleColor;
+use JakubOnderka\PhpConsoleHighlighter\Highlighter;
+
+class Colour implements Decorator
+{
+    private $highlighter;
+
+    public function __construct()
+    {
+        $this->highlighter = new Highlighter(new ConsoleColor());
+    }
+
+    public function getLine(string $fileContents, int $lineNumber): string
+    {
+        return $this->highlighter->getCodeSnippet($fileContents, $lineNumber, 0, 0);
+    }
+}
diff --git a/src/Printer/Console.php b/src/Printer/Console.php
index 793d5a3..6718352 100644
--- a/src/Printer/Console.php
+++ b/src/Printer/Console.php
@@ -13,6 +13,12 @@
 class Console implements Printer
 {
     private const DEFAULT_LINE_LENGTH = 80;
+    private $decorator;
+
+    public function __construct(Decorator $decorator)
+    {
+        $this->decorator = $decorator;
+    }
 
     public function printData(OutputInterface $output, FileReportList $fileReportList, HintList $hintList): void
     {
@@ -21,9 +27,12 @@ public function printData(OutputInterface $output, FileReportList $fileReportLis
         $output->writeln(PHP_EOL . $separator . PHP_EOL);
 
         $total = 0;
+
         foreach ($fileReportList->getFileReports() as $fileReport) {
             $entries = $fileReport->getEntries();
             $total += count($entries);
+            $contents = $fileReport->getFile()->getContents();
+            $contents = str_replace(["\r\n", "\r"], "\n", $contents);
             foreach ($entries as $entry) {
                 $output->writeln(sprintf(
                     '%s:%d  Magic number: %s',
@@ -32,9 +41,8 @@ public function printData(OutputInterface $output, FileReportList $fileReportLis
                     $entry['value']
                 ));
 
-                $highlighter = new Highlighter(new ConsoleColor());
                 $output->writeln(
-                    $highlighter->getCodeSnippet($fileReport->getFile()->getContents(), $entry['line'], 0, 0)
+                    $this->decorator->getLine($contents, $entry['line'])
                 );
 
                 if ($hintList->hasHints()) {
diff --git a/src/Printer/Decorator.php b/src/Printer/Decorator.php
new file mode 100644
index 0000000..3e6ee23
--- /dev/null
+++ b/src/Printer/Decorator.php
@@ -0,0 +1,8 @@
+<?php
+declare(strict_types=1);
+namespace Povils\PHPMND\Printer;
+
+interface Decorator
+{
+    public function getLine(string $fileContents, int $lineNumber): string;
+}
diff --git a/src/Printer/Plain.php b/src/Printer/Plain.php
new file mode 100644
index 0000000..4b67681
--- /dev/null
+++ b/src/Printer/Plain.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace Povils\PHPMND\Printer;
+
+class Plain implements Decorator
+{
+
+    public function getLine(string $fileContents, int $lineNumber): string
+    {
+        $format = '  > %d| %s';
+        return sprintf(
+            $format,
+            $lineNumber,
+            explode("\n", $fileContents)[$lineNumber - 1]
+        );
+    }
+}