Well, Both the drawn image and the model photo uses a silver grey color rather then white, I dont care what the text says, I go by the images (And think it looks good) And I say darker blue because during Storms the skies tend to be dark, Not light..=P
Though, another color scheme I realy love is the Flesh tearers..
http://wh40k.lexicanum.com/wiki/Flesh_Tearers Looks awesome.. but they are a blood angels descendant chapter..
Ooooo.... Then again, Looking arround some more, These guys look cool
http://wh40k.lexicanum.com/wiki/Silver_Skulls Anyone know how to get that dark steel color..? (Maybe Leadbelcher brushed with Nuln Oil or something..?)