interior?

i want to change up the interior of my car, such as recolor the vents and other items in my car, so its kind of two tone. but i have a gray interior, the dash is gray, the center console thing is gray and the carpets gray, along with the ceiling and panels, everything is gray.
i want to know in other peoples opinion if gray and green or gray and blue would look better. personally i want to make everyhting thats gray, black. but i honestly dont think thats gonna happen unless there is a guide on how to do everything. haha it just seems like too too much work. dont get me wrong i love doing stuff to my car but this seems like a lot of pointless work. so what would look better gray and blue (darker blue) not a bright blue, or gray and green? thanks
