Green - This color is great to use in presentations which require involvement of a crowd, and is generally used at computerized system teachings. The colour green express vitality and calmness. It is also connected to the harmony of growth and money.
Purple - An impressive color which is considered spiritual, encourage sensuality and the ability to survive. Usually a dark purple is used for background colors, and a lighter purple for prominence
Red - Hot, dominant and a color that attracts attention. Use this color for prominence, and for parts of the presentation that require involvement

Yellow - The yellow color irritates the eyes and the mind. However it is great to use as texts or for prominence on dark background colors. Yellow expresses happines and optimism. If you don't use this color on the correct background this could be very annoying.
Black - This color is also a neutral color in its own way, and expresses a new beginning. Black is good for emphasising text and is connected to sophistication, independence or something final. Use black for prominence or at the center of the screen for texts.
White - This color, as the black, is a neutral color. This color is a good for choosing as a background color or as text on blue background. White expresses a new page a new beginning and vitality .