Gray pants will go well with any color. I would chose something depending on the season and the event you are attending. Bright for summer and spring,
a white polo shirt gucci i recomend
Blue and grey nikes
khaki
Black, white, a darker or lighter shade of grey,
a grey shirt or a gray pants.
Any color shirt really, anything matches gray.
plain white tee.... or a tan coloured shirt nuetrals perferrably, you could do gray too
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.
Any shade of pink or purple.
You can wear a gray shirt with brown pants, but you might want a real light gray or try a green shirt with brown pants might be better.
Probably a gray coat.
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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.
black it goes with every color.