Faces used for SGR control sequences determining a face.
This vector holds the faces used for SGR control sequence parameters 0
to 7.
Parameter Description Face used by default
0 default default
1 bold bold
2 faint default
3 italic italic
4 underlined underline
5 slowly blinking success
6 rapidly blinking warning
7 negative image error
Note that the symbol `default' is special: It will not be combined
with the current face.
This vector is used by `ansi-color-make-color-map' to create a color
map. This color map is stored in the variable `ansi-color-map'.