i think blue matches or probably yellow if you just try black it will work with any colour except black.
It's a little bland of a color combination but it would definitely work if you worked it!
Mercury is grayish/whitish color, or a dark gray!
dark
Charcoal is a dark gray color.
Charcoal is a dark gray color.
A dark gray color
The opposite to gray is gray dark gray is light gray ;)
Dark gray.
gray converse
Usually a grayish color. Dark gray.
probaly black or dark gray
Gray is said to be dark and dismal as in gloomy gray skies