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hexToRGB javascript Code Snippet in 2022

stringmathadvanced

Last Updated: 26 November 2022

Converts a color code to an rgb() or rgba() string if alpha value is provided.

  • Use bitwise right-shift operator and mask bits with & (and) operator to convert a hexadecimal color code (with or without prefixed with #) to a string with the RGB values.
  • If it's 3-digit color code, first convert to 6-digit version.
  • If an alpha value is provided alongside 6-digit hex, give rgba() string in return.
const hexToRGB = hex => { let alpha = false, h = hex.slice(hex.startsWith('#') ? 1 : 0); if (h.length === 3) h = [...h].map(x => x + x).join(''); else if (h.length === 8) alpha = true; h = parseInt(h, 16); return ( 'rgb' + (alpha ? 'a' : '') + '(' + (h >>> (alpha ? 24 : 16)) + ', ' + ((h & (alpha ? 0x00ff0000 : 0x00ff00)) >>> (alpha ? 16 : 8)) + ', ' + ((h & (alpha ? 0x0000ff00 : 0x0000ff)) >>> (alpha ? 8 : 0)) + (alpha ? `, ${h & 0x000000ff}` : '') + ')' ); };
hexToRGB('#27ae60ff'); // 'rgba(39, 174, 96, 255)' hexToRGB('27ae60'); // 'rgb(39, 174, 96)' hexToRGB('#fff'); // 'rgb(255, 255, 255)'

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