<?php
 
	$hexa = '#add555';
	$r = hexdec(substr($hexa,1,2)); // Se for sem o #, mude para 0, 2
	$g = hexdec(substr($hexa,3,2)); // Se for sem o #, mude para 3, 2
	$b = hexdec(substr($hexa,5,2)); // Se for sem o #, mude para 5, 2
	$luminosidade = ( $r * 299 + $g * 587 + $b * 114) / 1000;
 
	echo 'R: ' . $r . PHP_EOL;
	echo 'G: ' . $g . PHP_EOL;
	echo 'B: ' . $b . PHP_EOL;
	echo 'Luminosidade: ' . $luminosidade . PHP_EOL;
 
	if( $luminosidade > 128 ) {
		echo 'Cor clara';
	} else {
		echo 'Cor escura';
	}
 

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