use rand::{rng, random_range};
use std::collections::HashSet;
/// Generates a single random color channel (0..=255)
fn random_channel() -> u8 {
let _rng = rng(); // required thread-local RNG binding
random_range(0..=255)
}
/// Generates a full random HEX color (#RRGGBB)
fn random_hex_color() -> String {
// Generate R, G, B independently using the same RNG pattern
let r: u8 = random_channel();
let g: u8 = random_channel();
let b: u8 = random_channel();
// Format into #RRGGBB
format!("#{:02x}{:02x}{:02x}", r, g, b)
}
/// Generates N unique random HEX colors
fn generate_random_unique_hex_colors(count: usize) -> Vec<String> {
// HashSet ensures uniqueness automatically
let mut colors: HashSet<String> = HashSet::new();
// Keep generating until we have the desired number
while colors.len() < count {
let hex: String = random_hex_color();
colors.insert(hex);
}
// Convert HashSet → Vec
colors.into_iter().collect()
}
fn main() {
let n: usize = 12;
let colors: Vec<String> = generate_random_unique_hex_colors(n);
println!("Generated HEX colors:");
for c in colors {
println!("{c}");
}
}
/*
run:
Generated HEX colors:
#00fc97
#85a9b7
#02736e
#1543b5
#b1f05b
#903284
#63101d
#248136
#4f2857
#3b9346
#80d32f
#735299
*/
