This subclass of Convert::Color::RGB8 provides lookup of the colors that xterm uses by default. Note that
the module is not intelligent enough to actually parse the XTerm configuration on a machine, nor to query
a running terminal for its actual colors. It simply implements the colors that are present as defaults in
the XTerm source code.
It implements the complete 256-color model in XTerm. This range consists of:
• 0-7: The basic VGA colors, dark intensity. 7 is a "dark" white, i.e. a light grey.
• 8-15: The basic VGA colors, light intensity. 8 represents a "light" black, i.e. a dark grey.
• 16-231: A 6x6x6 RGB color cube.
Sinceversion0.06: This can also be specified as "rgb(R,G,B)" where each of R, G and B can be 0 to
5, or "0%" to "100%".
• 232-255: 24 greyscale ramp.
Sinceversion0.06: This can also be specified as "grey(GREY)", where GREY is 0 to 23, or "0%" to
"100%".