If the colormap is an installed map for its screen, the changes are visible immediately. Due to the screen's hardware limitations or gamut compression, the color stored in the colormap may not be identical to the color specified. Diagnostics BadAccess A client attempted to free a color map entry that it did not already allocate. BadAccess A client attempted to store into a read-only color map entry. BadColor A value for a Colormap argument does not name a defined Colormap.
Some numeric value falls outside the range of values accepted by the request.
Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error.