Setting color options

From the Tools menu, select Options.
Expand Agenda, then select Colors.
Select whether you want to color-code your meetings by importance level, attendance status, or ownership.
To define your own meeting colors, click the colored box next to a meeting type. This opens the Color dialog box where you can choose a color for the selected meeting type. To define a custom color, click Define Custom Colors. Select the shade you want, making adjustments using the six fields, and click Add to Custom Colors.
To use the Agenda default colors, click Default.