Evan Blass also known as @evleaks revealed that there will be four colors available for the upcoming Galaxy device: Midnight Black, Lilac Purple, Titanium Gray and Coral Blue. 
Samsung, according to evleaks, unveiled that the Coral Blue was added due to popular demand.
Coral Blue
Lilac Purple
We may have seen the complete set of colors for the Galaxy S9 and S9+, but we have yet to see a pink one, which could be released later this year.