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Meta query – Blue/Red items under 500 USD

Retrieve only blue OR red items, and under 500 USD.

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'price',
		'value'   => '500',
		'compare' => '<',
		'type'    => 'NUMERIC',
	),
	array(
		'relation' => 'OR',
		array(
			'key'     => 'color',
			'value'   => 'blue',
			'compare' => '=',
		),
		array(
			'key'     => 'color',
			'value'   => 'red',
			'compare' => '=',
		),
	),
);