Henri Matisse, a French painter, said that: “When I didn’t know what color to put down, I put down black.” “Black is a force: I used black as ballast to simplify the construction…” Although he did not work in fashion, he made a great point.
I have tried on countless pairs of black pants and combined them with countless tops. After years of experience, when it comes to fashion and style, I have found how important the pants are. I have developed theories in clothing combination and there is a rule related to the pants. I have named it “Henri Matisse Rule”.
Henri Matisse Rule:
When you don’t know what to wear with a top, choose black pants.
Sometimes the pants can be replaced with a black skirt or black shorts. It depends on you. I know it is not new. But believe it or not, a lot of people do not know that.
For example, you have a colorful coat and do not know what pants and inner top to pair with. My advice is to choose black pants first. Next, you choose an inner sweater or shirt/T-shirt which goes well with the pants and your coat.
In my experience, when you apply “Henri Matisse Rule”, at least 90 percent of the combinations are “good” (“good” here means that all items look good together). And I have discovered that stylish people dress so well black pants.
 Jack Flam (1995), Matisse on Art, p. 166.