Konica Minolta SC-215 - Manual (Page 45)

6-7
8-Bit Color
A 8-Bit Color image provides 256 color hues in the image. The file size
of a 256 color image is 1/3 the size of a 24-Bit Color image.
8-Bit Color Image
24-Bit Color
A 24-Bit Color image consists of three 8-bit color channels. The red,
green, and blue channels are mixed together to create a combination
of one billion colors which give a more true-to-life quality to the image.
Choose 24-Bit Color if you are scanning color photos.
24-Bit Color Image