args = array(
 'post_type' => 'product',
 'meta_query' => array(
	array(
		'key' => 'color',
		'value' => 'blue',
		'compare' => 'NOT LIKE'
	),
	array(
		'key' => 'price',
		'value' => array( 20, 100 ),
		'type' => 'numeric',
		'compare' => 'BETWEEN'
		)
	)
 );
$query = new WP_Query( $args );