Usually it's the actual color in the FTF - if there is some "fancy", as the forum thread calls it, name for the coloring it goes in [brackets].
This has more to do with wording that means a color, but really isn't a color - they seem to be fruits like Pumpkin for orange, Lime for green, Strawberry for red, but also things like variant names like "Zombie Skin"
www.discogs.com
If the marketing color is close enough to the actual coloring, I don't mind - but "Purple Splash" is not accurate when the actual color is Purple and Green.