[loganc2342]

It's a black bishop, but not necessarily a dark-squared bishop. Both the black side and white side in a normal chess game get a dark-squared and a light-squared bishop, and I don't see anywhere that specifies which type this one is. It can be either one depending on where you place it.

[sltkr]

Also if you care that much just mirror the solution horizontally or vertically, and now your bishop is on the white square instead.