If the setting permits casual styling, consider pairing a white turtleneck with blue jeans. A pair of tan uggs will add a mellow vibe to your ensemble.
White Turtleneck with Blue Jeans Relaxed Outfits For Women
If you like classic combos, then you'll like this combo of a white turtleneck and blue jeans. You know how to dial it down: white low top sneakers.