Plain and pattern styles have evolved over the “fashion years”. It’s easy to now mix and match different outfits for English plain and pattern combination styles. They make work wear more fun and less boring.
There are different patterns one can choose from; stripes, tartan, check, animal prints and so on. The key is to ensure that you keep it simple. Make either the blouse, skirt or trousers patterned. Only do both if you are good at mixing patterns and not looking clownish.