Final answer:
The correct hexadecimal code for the color black is #000000, which indicates no red, green, or blue presence in the color.
Step-by-step explanation:
The correct hexadecimal code for the color black is #000000. In hexadecimal color codes, the first two characters after the hash (#) represent the red component, the next two represent the green component, and the last two represent the blue component. Since black is the absence of all colors, there is no red, green, or blue present, which is indicated by all zeros in the color code. The alternatives provided, such as #FFFFFF (white), #FF0000 (red), and #00FF00 (green), represent colors where one or more of the color components are fully present (indicated by 'FF') or none (indicated by '00').