yes
Yes because the gray and the brown are neutral colors; therefore, the blue pants would look fine with the gray shirt and the brown shoes.
no it doesnt why dont you try something blue
If we are talking about just blue with no design, then a gray shirt would go really well with the suit!
gray converse
Yes, you can. It may not be Saville Row, but it certainly isn't ugly or garish.
yes it would
brown work shoes
Yes, Lavender and gray match quite well.
Yes.
Yes if you want to. No if you don't.
Yes, for years a gray suit with a blue shirt have been the standard in business attire. This has evolved to any combination of gray pants and blue shirt, blue pants and gray shirt, etc. This is one of the most popular color combinations in the American society.
yes