Why are ansi 3/4 bit colors not supported? about crossterm HOT 2 OPEN

AFAICS the 8-bit 0x00..0x0F and 3/4-bit colors are equivalent; the linked article mentions that:

As 256-color lookup tables became common on graphic cards, escape sequences were added to select from a pre-defined set of 256 colors:^{[citation needed]}

ESC[38;5;⟨n⟩m Select foreground color      where n is a number from the table below
ESC[48;5;⟨n⟩m Select background color
  0-  7:  standard colors (as in ESC [ 30–37 m)
  8- 15:  high intensity colors (as in ESC [ 90–97 m)
 16-231:  6 × 6 × 6 cube (216 colors): 16 + 36 × r + 6 × g + b (0 ≤ r, g, b ≤ 5)
232-255:  grayscale from dark to light in 24 steps

from crossterm.

Sorry, for responding so late.

Yes, the colors are equivalent.

If I remember correctly, my issue was more with the fact that crossterm doesn't let you choose which codes to emit, even though it has separate types for named colors and ansi colors.

from crossterm.