How to convert RGB24 to RGB for web?

Question

I have some colors in RGB24 format, for example: 1581613 How to convert it to RGB for web usage? If I understand correctly, the format is as follows RRRGGBB.

Last code i've trying to run is:

const color = 1581613;

const red   = (color >> 5) * 255 / 7;
const green = ((color >> 2) & 0x07) * 255 / 7;
const blue  = (color & 0x03) * 255 / 3;

But my attempts did not lead to success.

hello, what is `1581613`? what does it stand for? – Scaramouche Feb 10 '20 at 19:34 — Scaramouche, Feb 10 '20 at 19:34
`const hexcol = "#" + color.toString(16).padStart(6, '0');` – Feb 10 '20 at 19:54 — , Feb 10 '20 at 19:54
Thanks @ChrisG! Great answer in one line – user2338232 Feb 10 '20 at 20:12 — user2338232, Feb 10 '20 at 20:12

score 1 · Accepted Answer · answered Feb 10 '20 at 19:45

I'm guessing a lot here, but here goes:

const color = 1581613;

const red   = (color >> 16) & 255;
const green = (color >> 8) & 255;
const blue  = color & 255;

const hex = red.toString(16) + green.toString(16) + blue.toString(16);

document.write(JSON.stringify({rgb: [red, green, blue], hex }, null, 2));

How to convert RGB24 to RGB for web?

1 Answers1