pub fn colour_level(
colour: bool,
colorterm: Option<&str>,
colorfgbg: Option<&str>,
) -> ColourLevelExpand description
The level for a stream. colour is whether the stream takes colour at all (a terminal,
and no NO_COLOR). COLORTERM of truecolor or 24bit means 24-bit colour, the same
test as anstyle_query::truecolor. The terminal counts as light only when COLORFGBG
is set and its last field, the background, is 7 or 15.