Does hair remain black after a hair transplant?

Hairs don't remain black after surgery.  Your hair may grey like your donor hair one day.  It is always a good idea to follow up with your doctor if you have concerns.

Hair involved in a hair transplant procedure is simply moved from a donor area to a recipient area.  Whatever color the hair is naturally, is the color it will remain in the new location....so if it was black to begin with it will remain black.  If eventually you do go gray, the grafted hair as well as the original hair will go gray.

Hair transplant involves moving hairs from the back of the scalp (that are not programmed to die) to the bald areas of the hairline, midscalp, and crown. These transplanted hairs should  retain their natural color, texture, thickness, etc.

The hair color does not change when they grow back after a transplant. If hairs are black they remain black. 

The color of your hair after a transplant will follow your pattern as if you had not had a transplant. So if your hair was going to become gray at some point, that will still occur.  Hair transplants have not been shown to affect hair color.

Usually, your before hair transplant color will appear in the newly transplant grafts. On rare occasion, these hairs may become whiter earlier. 

the hair characteristics and color will remain the same as it was before the transplant. So if it was black in color it will remain black.

The color of the hair should not change with a hair transplant. The texture of the hair may change temporarily as it grows out, but in the long term it will have the same texture as the donor hair.