ColorSchemes Property
Returns a ColorSchemes collection that represents the color schemes in the specified presentation. Read-only.
Example
This example sets the background color for color scheme three in the active presentation and then applies the color scheme to all slides in the presentation that are based on the slide master.
With ActivePresentation
Set cs1 = .ColorSchemes(3)
cs1.Colors(ppBackground).RGB = RGB(128, 128, 0)
.SlideMaster.ColorScheme = cs1
End With