30-seconds-of-code/snippets/randomHexColorCode.md

randomHexColorCode

Generates a random hexadecimal color code.

Use Math.random to generate a random 24-bit(6x4bits) hexadecimal number. Use bit shifting and then convert it to an hexadecimal String using toString(16).

const randomHexColorCode = () => { 
  let n = (Math.random() * 0xfffff | 0).toString(16); 
  return '#' + (n.length !== 6 
        ? (Math.random() * 0xf | 0).toString(16) + n : n); 
}; 

randomHexColorCode() // "#e34155"
randomHexColorCode() // "#fd73a6"
randomHexColorCode() // "#4144c6"