From the Format menu, select Colors.
Click New and type the name you want to assign the new color in the Untitled field that appears. The new color name is added to the list and automatically selected so you can make color adjustments.
Click Modify. The Color dialog opens
From the Basic Colors grid, click the basic color closest to the one you want to create.
In Red, Green, and Blue fields, specify color values by entering numbers between 0 and 255 (where 0 removes all traces of the color and 255 adds the color completely).
In Hue, Saturation, and Luminosity fields, define the corresponding attributes by entering numbers between 0 and 255.
Or you can:
Drag the mouse across the color spectrum box in the upper-left of the dialog to set hue and saturation values.
Move the sliding triangle up or down to set the luminosity value. The Color/Solid box displays the dithered and solid colors that correspond to your selection.
To close each of the dialogs and return to your topic, click OK.
To apply the new color, select the text you want to change, and then select the new color from the Change font color drop-down list on the WYSIWYG toolbar.