While changing colors is similar to picking a variation of a theme, to guarantee that your tropical vacation tour presentation will have your unique stamp, customize the theme colors by picking different colors.
When you click the Colors button, the Theme Colors gallery displays all of the color sets from the built-in themes, along with the corresponding theme name. To create custom colors, click Create New Theme Colors at the bottom of the Theme Colors gallery.
You'll have a chance to customize colors later, in the practice.