A metallic blazer is a really special and glamorous unique. You can look great in it, but on the other hand you have to be extra careful when you make it part of an outfit. If you are classic and chic, you should keep it simple with neutral color shades. But if you are a fashionista, take risks and be stylish with mix and match.
A total black outfit is always a good selection for an all day outfit. Leather pants go perfectly woth a simple black shirt. However, total black gets more stylish and formal with a golden metallic blazer and strapped high heels.