Use a different color theme for MS PowerPoint

• On the Design tab, in the Themes group, click Colors button. A gallery of color themes opens Create a Custom color theme :
• On the Design tab,  in the Themes group,  click the down arrow right to the Colors button to open the colors list.
• Click Create New Theme Colors.
• Type a name for the new color theme in the Name:box.
• To change color,  just click on color placeholder will open it's menu. 
• Select a color. 
• Alternatively,  you can click More Colors,  select a color from the Colors dialog box,  and click OK 
• Redefine any other colors as needed. 
• Click Save button.  The color scheme is saved,  and appears at the top of the Colors gallery,  in the Custom area.