If a specified pixel is not a valid index into the colormap, a BadValue error results. If the colormap is an installed map for its screen, the changes are visible immediately. 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.