<?php  
	for ( $k = 0; $k <= 5; $k++ ) {
		for ( $j = 0; $j <= 5; $j++ ) {
			echo "";
			for ( $i = 0; $i <= 5; $i=$i+1 ) {
				echo '<td style="background-color: rgb(' . 
					$i*51 . ',' . 
					$j*51 . ','. 
					$k*51 . '); color: rgb(' .
					(255-$i*51) . ',' .
					(255-$j*51) . ',' . 
					(255-$k*51) .');">rgb(' . 
					$i*51 . ',' . 
					$j*51 . ',' . 
					$k*51 . ')</td>'."\n";
			}
			echo "</tr<";
		}
	}
?>