Canon BJC-3000 - Manual (Page 297)

297 Troubleshooting - Other scanner problems
Improper colours are displayed in the dialogue box
Check Is the number of display colours set to 256 Colors?
This problem occurs when IS Scan is launched from a TWAIN-compatible
application program.
Check the number of display colours as follows.
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.
1
From the Apple menu, select Control Panels.
2
Select Monitors & Sound.
3
Check that Thousands or Millions are set for Colour Depth.
Windows
Macintosh