val stdout_ppf : Stdlib.Format.formatter
val stderr_ppf : Stdlib.Format.formatter
val null_ppf : Stdlib.Format.formatter
val colored :
?style:[< `Bold | `Italic | `Thin | `Underline ] ->
?color_mode:[< `Bg | `Fg Fg ] ->
[< `Black
| `Blue
| `Bright_black
| `Bright_blue
| `Bright_cyan
| `Bright_green
| `Bright_magenta
| `Bright_red
| `Bright_yellow
| `Cyan
| `Green
| `Magenta
| `Red
| `White
| `Yellow ] ->
Stdlib.Format.formatter ->
('a, Stdlib.Format.formatter, unit, unit) Stdlib.format4 ->
'a