Function readable_foreground_for

src/apps/cli/src/ui/theme.rs:545–574

(background: Color)

}

fn readable_foreground_for(background: Color) -> Color {
    match background {
        Color::Reset => Color::Reset,
        Color::Black
        | Color::Red
        | Color::Green
        | Color::Blue
        | Color::Magenta
        | Color::DarkGray => Color::White,
        Color::Yellow
        | Color::Gray
        | Color::LightRed
        | Color::LightGreen
        | Color::LightYellow
        | Color::LightBlue
        | Color::LightMagenta
        | Color::LightCyan
        | Color::White
        | Color::Cyan => Color::Black,
        Color::Indexed(idx) => readable_foreground_for(idx_to_ansi16(idx)),
        Color::Rgb(r, g, b) => {
            let lum = relative_luminance(r, g, b);
            if lum > 0.36 {
                Color::Black
            } else {
                Color::White
            }
        }
    }
}

fn relative_luminance(r: u8, g: u8, b: u8) -> f64 {
    fn channel(v: u8) -> f64 {