I would probably like the buttons changed to say smoked pearl because with its conservative styling, it may look too much like a suit jacket otherwise. It would be great for the evening. Use a lighter shade of pants than you would ordinarily use, in the medium to light category, or even an "oatmeal" color, now that's Hip.

And the shirt and tie are fine, but also consider a sweater in the color of the tie, that "Hermes" orange.

Navy and black is tres sophistique. I especially like wearing a midnight blue suit or jacket with a black torso swathing underneath, either a dress shirt in cotton or silk, or a polo shirt in cotton or wool/cashmere, or a sweater (also either cotton or wool/cashmere). Black and navy work because it is a very taboo combo due to the influence of women on men's fashion. It is a way for men in the USA to re-take the wardrobe back from les femmes.