30-seconds-of-code/snippets/RGB-to-hexadecimal.md

RGB to hexadecimal

Convert each value to a hexadecimal string, using toString(16), then padStart(2,'0') to get a 2-digit hexadecimal value. Combine values using join('').

const rgbToHex = (r, g, b) =>
  [r,g,b].map( v => v.toString(16).padStart(2,'0')).join('');
// rgbToHex(0, 127, 255) -> '007fff'