Wear a red coat.

Wear a red coat (verb phrase) For example, he often wears a red coat to school.

He often wears a red coat to school.

For example, the man in the red coat comes from my hometown.

The man in a red coat comes from my hometown.

He is wearing a red coat now.

He is wearing a red coat now.

Wear+colors, clothes (fixed phrases)

For example:

She is wearing a red coat.

She is wearing a red dress.