Are the Colours of Mercuric Compounds Accurate?

[mooncrater]

Homework Statement

While reading my textbook I found that $Hg(NH_2)Cl.Hg$ was given of black colour , whereas $Hg(NH_2)Cl$ of white colour.So is this correct?

Homework Equations

None

The Attempt at a Solution

I googled about $Hg(NH_2)Cl$ . It is $white$ in colour . But I am not sure about $Hg(NH_2)Cl.Hg$.

 

[Borek]

Some mercury compounds are gray because of the presence of metallic mercury, perhaps that's this kind of situation.