I was going through one of my favourite Holland Lop websites and came across this page on Kit Development.
It suddenly struck me on how similar my kits looked with those in the photos on this website.
I am convinced that the 2 “black” ones are CHOCOLATES. See for yourself:
Tru-Luv Rabbitry: Quality Holland Lops in Malaysia 
I do not think they are chocolates. Chocoate is a recessive gene and unless both sides have it, it is impossible for them to have chocolate babies. In addition, i have chocolate babies and they do not look like that.