Purple hatch

Black Doors are doors that can be only be opened by a weapon using chilling Dark energy, The Dark Beam. They are only found in Metroid Prime 2: Echoes. The black color is actually the color of a force field covering the door. After shooting a black colored door, the energy covering it will disrupt and dissipate, allowing Samus to enter the next room.

Black Doors are very common and they appear all over Aether, like their alternatives do.