This is exactly right. The high frequency of the "blue" region of the visible spectra makes it very prone to scattering. This is in fact the reason the sky is blue. And a "bright" blue at that. So I suppose then we can extrapolate to say that Red marble would be ideal (If it has to be visible that is)?

[black]-"The further we go and older we grow, the more we know, the less we show."[/black]