Palette is extracted (and sorted afterward) as union of all 6 original "cabin" background colorspaces. It was missing for <30 years.
It provides very dystopian, cold and dark atmosphere, although it is possible to make bright and pleasant setup (e.g. CABIN4.BMP). Moreover, it is intended for blurry backgrounds (not so often found as pixel art, imo).
*It is considered safe because it does not interfere with ("infamous") videos playing on top of it: all (or most) other colors from DOS Mode13h VGA 256 palette are reserved for video reproduction. Although: it is allowed to use all 256 colors in FFE for bkgs, but weird videos are becoming even more strange then, and parts of backgrounds start to dynamicaly and randomly change colors. Moreover, colors are not restored entirely afterwards (when video stops).
;Colors: 86 FF101010 FF280818 FF102010 FF202020 FF481018 FF102070 FF282820 FF282840 FF303030 FF482828 FF682830 FF304840 FF404040 FF882828 FF504850 FFa82820 FF505050 FF684850 FF386840 FF884838 FF4858a8 FF506850 FF308030 FF606060 FF885058 FFa84838 FF686858 FF488050 FFa85050 FFd04818 FF886840 FF686898 FF309830 FFc84848 FF608040 FF707070 FF886868 FF608058 FFa86830 FF489838 FF788038 FF788060 FFa86860 FF588890 FF609830 FF509860 FF808080 FF788098 FF609860 FF908838 FFc86858 FF789838 FF908860 FFa88838 FF789868 FF908898 FFc08040 FFa88860 FF789898 FF58b850 FF909090 FFa88890 FF9090c8 FFc08888 FF78b860 FF90a0c0 FF90a898 FFa8a858 FF90b070 FFc89858 FFa0a0a0 FF78c080 FFe88888 FFa8a898 FF68d860 FFa8a8d8 FFb0b0b0 FF90c888 FFc8a8b0 FFa8c0a0 FFb0c0c0 FFc0c0c0 FFc8c8b8 FFd0d0d0 FFe8c8c8 FFe0e0e0