For instance, a mustard T-shirt can offset a pair of blue jeans and grey shoes. The trick is to let mustard yellow be the focus and to keep the rest of your look toned down in colour.

Flowy Palazzo Trousers, $50, Mango Mango Denim Jacket, $35, H&M H&M Trim Linen-blend T-shirt, $30, Mango Mango Dark complexion: Anything but a mellow yellow If you have a darker complexion, pick a ...

As Matilda explained, it’s not everyday that either of them wears bright, poppy shoes. “It was a random choice and then we realized they looked like ketchup and mustard,” she said.