diff --git a/backend/app/Controllers/OTPController.php b/backend/app/Controllers/OTPController.php
index 219ba42..b297bd1 100644
--- a/backend/app/Controllers/OTPController.php
+++ b/backend/app/Controllers/OTPController.php
@@ -28,9 +28,22 @@ class OTPController extends BaseController
         if (function_exists('imagecreate')) {
             // Base image
             $img = imagecreatetruecolor(400, 200);
-            $bg = imagecolorallocate($img, 240, 248, 255); // Alice blue background
-            $textColor = imagecolorallocate($img, 15, 23, 42); // Dark text
-            $lineColor = imagecolorallocate($img, 203, 213, 225); // Subtle lines
+            
+            // Define high-contrast, beautiful color palettes [bg, text, line]
+            $palettes = [
+                ['bg' => [240, 248, 255], 'text' => [15, 23, 42], 'line' => [148, 163, 184]],   // Light Blue / Dark Navy
+                ['bg' => [255, 250, 240], 'text' => [67, 20, 7], 'line' => [252, 211, 77]],     // Floral White / Dark Brown
+                ['bg' => [240, 253, 244], 'text' => [6, 78, 59], 'line' => [110, 231, 183]],    // Mint Green / Dark Green
+                ['bg' => [254, 242, 242], 'text' => [127, 29, 29], 'line' => [252, 165, 165]],  // Light Red / Dark Red
+                ['bg' => [250, 245, 255], 'text' => [88, 28, 135], 'line' => [216, 180, 254]],  // Light Purple / Dark Purple
+                ['bg' => [255, 247, 237], 'text' => [154, 52, 18], 'line' => [253, 186, 116]],  // Light Orange / Dark Orange
+            ];
+            
+            $palette = $palettes[array_rand($palettes)];
+            
+            $bg = imagecolorallocate($img, $palette['bg'][0], $palette['bg'][1], $palette['bg'][2]);
+            $textColor = imagecolorallocate($img, $palette['text'][0], $palette['text'][1], $palette['text'][2]);
+            $lineColor = imagecolorallocate($img, $palette['line'][0], $palette['line'][1], $palette['line'][2]);
             
             imagefill($img, 0, 0, $bg);
             
@@ -39,17 +52,27 @@ class OTPController extends BaseController
                 imageline($img, rand(0, 400), rand(0, 200), rand(0, 400), rand(0, 200), $lineColor);
             }
             
-            // Create a temporary small image for the text (since built-in font 5 is small)
+            // Add random noise dots
+            for ($i = 0; $i < 200; $i++) {
+                imagesetpixel($img, rand(0, 400), rand(0, 200), $lineColor);
+            }
+            
+            // Create a temporary small image for the text
             $tmp = imagecreatetruecolor(100, 40);
-            $tmpBg = imagecolorallocate($tmp, 240, 248, 255);
-            $tmpText = imagecolorallocate($tmp, 15, 23, 42);
+            $tmpBg = imagecolorallocate($tmp, $palette['bg'][0], $palette['bg'][1], $palette['bg'][2]);
+            $tmpText = imagecolorallocate($tmp, $palette['text'][0], $palette['text'][1], $palette['text'][2]);
             imagefill($tmp, 0, 0, $tmpBg);
             
-            $spacedCode = implode('  ', str_split($code));
-            imagestring($tmp, 5, 10, 12, $spacedCode, $tmpText);
+            $spacedCode = implode('   ', str_split($code)); // Slightly wider spacing
             
-            // Scale up the text image to the main image
-            imagecopyresized($img, $tmp, 0, 0, 0, 0, 400, 200, 100, 40);
+            // Draw text multiple times with 1px offsets to create a bold effect
+            imagestring($tmp, 5, 8, 12, $spacedCode, $tmpText);
+            imagestring($tmp, 5, 9, 12, $spacedCode, $tmpText); // Bold X
+            imagestring($tmp, 5, 8, 13, $spacedCode, $tmpText); // Bold Y
+            imagestring($tmp, 5, 9, 13, $spacedCode, $tmpText); // Bold XY
+            
+            // Scale up the text image to the main image using resampled for smooth (non-pixelated) edges
+            imagecopyresampled($img, $tmp, 0, 0, 0, 0, 400, 200, 100, 40);
             
             imagepng($img, $filepath);
             imagedestroy($img);
@@ -198,8 +221,7 @@ class OTPController extends BaseController
             } else if ($type === 'image') {
                 // Generate OTP Image
                 $imageUrl = $this->generateOtpImage($code);
-                $captionMsg = "مرحباً! هذا هو رمز التحقق الخاص بك لمتجر نابه. الرجاء عدم مشاركته.";
-                ConversationFlowEngine::sendReply($session, $phone, $captionMsg, $imageUrl);
+                ConversationFlowEngine::sendReply($session, $phone, '', $imageUrl);
             } else {
                 // Send text
                 $textMsg = "رمز التحقق الخاص بك لمتجر نابه هو: *{$code}* \n الرجاء عدم مشاركته مع أي شخص.";