Add Color::bg256 and Color::fg256

Author: kodie

README.md

@@ -465,7 +465,7 @@ echo $color->ok('This is ok msg');
 ```php
 Ahc\Cli\Output\Color::style('mystyle', [
     'bg' => Ahc\Cli\Output\Color::CYAN,
-    'fg' => '38;5;57', // 256 colors can be used as well
+    'fg' => hc\Cli\Output\Color::fg256(57), // 256 colors can be used as well
     'bold' => 1, // You can experiment with 0, 1, 2, 3 ... as well
 ]);
 

src/Output/Color.php

@@ -117,6 +117,22 @@ public function info(string $text, array $style = []): string
         return $this->line($text, static::$styles['info'] + $style);
     }
 
+    /**
+     * Returns the color code for a 256 background color
+     */
+    public function bg256(int $code)
+    {
+        return "48;5;{$code}";
+    }
+
+    /**
+     * Returns the color code for a 256 foreground color
+     */
+    public function fg256(int $code)
+    {
+        return "38;5;{$code}";
+    }
+
     /**
      * Returns a formatted/colored line.
      */