Geomantic speaking, the entrance door is black, and the center of the door is gray, is that ok?

First of all, the color of the entrance door should correspond to the orientation, and the southeast and northwest should correspond to the wood fire and the golden water respectively.

And black belongs to water, and then it depends on the direction of your door.

If it faces south, that's good. Water can keep the fire out.

It's not good to face north. There is too much water, and it is not good for your health to catch cold in the shade.

Facing the east is good, because water comes from wood, and water also represents wealth.

Facing west, golden water and white tiger protect the Lord.