After using any of colorbook colors it is not possible to get rid of this color afterwards. For example if color white is used from colorbook then all elements which previously used RGB white are changed to colorbook. Even if element is deleted the color remains in file forever and even infects other files if they are merged. Either the compress option should allow to get rid of unused colors/reset colorbooks to RGB or the programming API should be updated so we can access these colors. This issue is critical because it limits usage of RGB and colorbook colors.

Reference:TR 307809

TR # 13427