The black blazer is an must-have item for every shopaholic.  And please remember that the trick to looking stylish anytime, anywhere is learning to master the skill to combine colors properly. If you master the art of combining the basic black blazer with other fashion items, you would gradually master the art of dressing well.
I will give you different style equations to get different looks with your black blazer. The style equations here are color combos.
Okay, let’s go!
Note: it is okay for men to use these color combinations: (Scroll down to see the looks)
For both men and women:
1. I suggest you wear it with a gray/ white top and a pair of dark green pants. The top should be a deep v-neck T-shirt.

Wear black shoes with this outfit.

2. You can combine it with the dark gray top and a pair of gray pants/jeans. And Wear black shoes with this outfit.

3. You can wear a white shirt/blouse and the black pants. You can choose black moccasins, Oxford shoes, and heels to go with this outfit.