colors are hardcoded for applications, however there's a small
loophole you can use on 8-bpp displays to get something that is
almost, but not quite, entirely unlike X's resources.
the 'getmap' command will let you change to a different colormap from
the default. pre-defined cmaps are in /lib/cmap. from the
documentation:
On 8-bit color-mapped displays, getmap loads the display's
color map (default rgbv). The named colormap can be a file
in the current directory or in the standard repository
/lib/cmap. It can also be a string of the form gamma or
gammaN, where N is a floating point value for the gamma,
defining the contrast for a monochrome map. Similarly,
rgamma and rgammaN define a reverse-video monochrome map.
Finally, the names screen or display or vga are taken as
synonyms for the current color map stored in the display
hardware.
