Property sets the values of changing of the theme contrast. Using the DeltaHue and the
DeltaBrightness properties it is possible to receive many various themes from one source. The values can be from 0 up to 255. The changing of the property results in the immediate changes of the theme and repainting of all its components. If at loading of the theme its values are not equal to the default values, the changes are made with the loaded theme.
