ansi-color-names-vector is a variable defined in `ansi-color.el'.
Its value is

["black" "red3" "green3" "yellow3" "blue2" "magenta3" "cyan3" "gray90"]

Colors used for SGR control sequences determining a color.
This vector holds the colors used for SGR control sequences parameters
30 to 37 (foreground colors) and 40 to 47 (background colors).

Parameter Color
30 40 black
31 41 red
32 42 green
33 43 yellow
34 44 blue
35 45 magenta
36 46 cyan
37 47 white

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'.

Each element may also be a cons cell where the car and cdr specify the
foreground and background colors, respectively.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.4 of Emacs.