Macro c256_bg 

macro_rules! c256_bg {
    ($col:expr) => { ... };
}

Constructs a 256-colour background colour code set (to be used in a control sequence)

Examples:

// Get the codes
assert_eq!("48;5;238", c256_bg!(238));
// Use in a sequence
assert_eq!("\u{1B}[48;5;238m", seq!(c256_bg!(238)));