In RS, color choice mainly depends on how much contrast with black parts do you want.
If you want no contrast go for black.
Red and grey will give a subtle contrast that is noticeable but will not stand out too much.
Silver and white will give highest contrast and are easier to maintain and will stand out the most contrast wise.
I went for lunar silver in RS because I liked silver-black contrast more than white. More importantly, silver looks least dusty considering I live in Lahore.
In this gen, white looks good in Oriel, but I didn't like it in RS. To me it looked like a zebra/panda color so it wasn't my personal preference.