I often use Watco Danish oils to match new plantation grown teak to the redder older growth teak. If you stop a shade under it will age to a near perfect match and does not look stained or colored and looks like 100% natural aging. Mahogany and Cherry are the two colors I use most and I will often blend the two until I get a good match. Watco Danish oils are wonderful...

Be sure to wait a few weeks before varnishing or urethaning as the Danish oils are slow to cure and some finishes don't like being over coated too soon.