You can adjust the density to the most appropriate level for color of the original when scanning. You can also adjust the background density for originals such as colored paper.
1.
Press [Scan and Send].
2.
Specify the destination → press [Options] → [Density].
3.
Press 
or 
to adjust the density for the original → press [OK] → [Close].
or to adjust the density for the original → press [OK] → [Close].