Today I Learned - Rocky Kev

TIL how to convert RGB to HEX to RGB again

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TAGS: javascript math

It's all just math! AAAAH!

Here are two helper functions to do that:

const rgb2hex = ([r, g, b]) =>
  '#' + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).substr(1);

const hex2rgb = hex =>
  [1, 3, 5].map((h) => parseInt(hex.substring(h, h + 2), 16));


rgb2hex([76, 11, 181]);
// #4c0bb5

hex2rgb("#4c0bb5");
// [76, 11, 181]

Via 11 JavaScript Tips and Tricks to Code Like A Superhero (Vol.2)

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