Now, the method to find out whether a cell has been colored or not is to
* src/dialog-cell-format.c (create_coloring_page): Now, the method to find out whether a cell has been colored or not is to compare the RGB values to zero. Commented out the attachment of background_radio_list because the functionality is not ready yet. * src/dialog-cell-format.c (apply_coloring_format): Added support for background solid coloring. Howver, changes to the style of the cells in this regard have no effect in the display. The reason for this is unknown to me as of now.