The colors you see on your webpages while working in iWeb may vary somewhat from the colors you see on the same pages after they have been published. You can modify your system preferences to ensure that the colors you see in iWeb match the colors on your published website as closely as possible.
Choose Apple menu > System Preferences.
Click Displays in the window that opens.
Click Color near the center-top of the window, and then click the Calibrate button.
Click Continue in the lower-right corner of the Display Calibrator Assistant window that appears.
Select 2.2 Television Gamma, and then click Continue.
Select D65, and then click Continue.
Name your new color profile something you can easily identify, such as "Gamma 2.2," and then click Continue.
Click Done.
Note:Every web browser handles color differently, and the color profile you set for your display may not provide an identical match.