As in one colour at the top (t-shirt/shirt + jacket) and a different one at the bottom, like so:

Of course it can be done with anything, not only jeans…I wouldn’t match the shoes to the top though because the colour-block effect would lose its strength.

Here are a few ideas:

ME+EM SLEEVELESS SWING JACKET black

ME+EM EVENING TEE Silk Jersey – Black

ME+EM BOY TROUSER Stretch Twill Tailoring – Oyster

or

MAISON MARGIELA Blazer light grey

ME+EM TIE NECK SILK BLOUSE Silk – Silver Grey

ME+EM BOY TROUSER Stretch Twill Tailoring – Navy

GIUSEPPE ZANOTTI DESIGN Sandals black patent

or

ME+EM LUXURY LEATHER BOMBER Leather – Soft Mink

ODIEUSES Blouse beige

ME+EM LUXE CREPE TROUSER Crepe – Black

I am not sure why but I prefer trousers, perhaps because there’s more fabric to create the “blocking” effect!

E.

Sleeveless jacket, Evening tee, Oyster trousers, Light grey blazer, Tie neck blouse, Navy trousers, Leather bomber jacket, Beige blouse, Black tampered trousers