Canon BJC 3000 Reference Manual page 287

Check 1
Is the number of display colours set to High Color or True Color?
Check the number of display colours as follows.
Windows
1
From the Start menu, select Settings and then select Control Panel.
2
Double-click the Display icon, then click the Settings tab.
3
Check that Colors is set to High Color or True Color in the Colors box.
Check the Colour Depth setting as follows.
Macintosh
1
From the Apple menu, select Control Panels.
2
Select Monitors & Sound.
3
Check that Thousands or Millions are set for Colour Depth.
Image contains unexpected colors,or is too light or too dark
Troubleshooting - Scanning result is unsatisfactory 287