Constant libnotcurses_sys::NCALPHA_FG_PALETTE

pub const NCALPHA_FG_PALETTE: u64 = crate::bindings::ffi::NC_FG_PALETTE; // 0x0800_0000_0000_0000u64

If this bit and NCALPHA_FGDEFAULT_MASK are set, we’re using a palette-indexed background color

See the detailed diagram at NcChannels

Note: When working with a single NcChannel use NCALPHA_BG_PALETTE;