The items may not be available depending on other settings you made.
Select the color of the output image.
When you select the following, the scanner detects the color of the originals automatically and saves the images using the detected colors.
Color/Grayscale:
Converts the scanned image into 24-bit color or 8-bit gray.
The available image types may vary depending on the File Format you selected. See the following for more details.