Color macro for raylib in Rust

macro.rs

use raylib::prelude::*;

#[allow(unused_macros)]
macro_rules! color {
    (# $color_hex:expr) => {{
        let color = i32::from_str_radix(stringify!($color_hex), 16).unwrap();
        let b = color % 0x100;
        let g = (color - b) / 0x100 % 0x100;
        let r = (color - g) / 0x10000;

        Color {
            r: r as u8,
            g: g as u8,
            b: b as  u8,
            a: 255
        }
    }};
}


#[test]
fn get_color () {
    let color_white = color!(#FFFFFF);
    let color_black = color!(#000000);

    assert_eq!(color_black, Color::BLACK);
    assert_eq!(color_white, Color::WHITE);
}