What do you mean by black? Sub-Saharan like? Because the Cheddar Man reconstruction looks nothing like Sub-Saharans.
Those various WHG dark reconstruction give me more Australoid-like vibes, South Indian-like vibe rather than SSA. Especially the dark skin and blue eyes, a combination which you can find sometimes among Gypsies.
And not all WHG-s looked like that, only the Western European ones which i suspect got it by absorbing an earlier population, which is represented by Y-DNA C1a2 and is the oldest native European haplogroup.
Look at this, WHG girl from Scandinavia reconstructed. If someone told me guess her origin, i would say somewhere in South India. But then again she looks a bit different facially, there is something which makes her appearance more unique.