(PHP 5 >= 5.6.0, PHP 7)
phpdbg_color — Sets the color of certain elements
phpdbg_color ( int $element , string $color ) : void
 Set the color of the given element. 
element
 One of the PHPDBG_COLOR_* constants. 
color
 The name of the color. One of white, red, green, yellow, blue, purple, cyan or black, optionally with either a trailing -bold or -underline, for instance, white-bold or green-underline. 
No value is returned.
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    https://www.php.net/manual/en/function.phpdbg-color.php