Every presentation you create with PowerPoint 2007, even a blank one, has a set of colors associated with it. This color scheme consists of 12 complementary colors designed to be used for the following elements of a slide:
Use the four Text/Background colors for dark or light text on a dark or light background.
Use Accent 1 through Accent 6 for the colors of objects other than text.
Use Hyperlink to draw attention to hyperlinks.
Use Followed Hyperlink to indicate visited hyperlinks.
In the palette displayed in color galleries such as the Font Color gallery in the Font group on the Home tab, 10 of the 12 colors appear with light to dark gradients. (The two background colors are not represented in these palettes.) ...