Let the contrast remain intentional
White open-knit over a black strappy top makes the base layer visible. Rather than trying to hide it, use the contrast as part of the outfit. Black trousers repeat the top, while blue jeans offer a more relaxed version for a mild day off.
Notice where the straps show through the neckline. A comfortable, consistent arrangement is easier to wear than one strap you continually try to tuck beneath the sweater. If the contrast feels too strong, choose a pale base and keep the same layering idea with less visual separation.
Test an exposed shoulder in ordinary movement
The sweater can sit loosely off one shoulder. Try that position while picking up a bag, reaching forward and sitting down. If it immediately slips farther than you want, a less open neckline may be more comfortable than repeatedly pulling it back into place.
The strappy top should also fit well by itself. Soft knitwear above it cannot resolve slipping straps or an uncomfortable waistband. Try the two layers separately before combining them. That makes it easier to identify which garment needs adjusting or replacing with another cut.
Move between indoor and outdoor conditions
Open-knit reveals the base layer but provides different warmth depending on its construction. A plain jacket may help on a fresh evening. Check whether the broad shoulder area sits neatly beneath it instead of pulling the entire neckline backwards while putting the jacket on.
A small bag with a comfortable strap may be easier than a heavy shoulder bag that pulls on the loose neckline. In warmer conditions, remove the knit and wear the black top with the same trousers. Plan the base as a complete part of the combination rather than merely an addition you hope nobody notices.
