Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

HTML

<div class="post">
    hello
</div>

JavaScript

postID = 1/* get your post ID as int */

/* gets a number between 1 and 25 from your post ID */
colourID = (postID % 25) + 1 

/* this tells which step to use for each colour */ 
base3ColourID = colourID.toString(3) 

/* this always returns 3 digits */
niceB3CID = ("000").substring(base3ColourID.length) + base3ColourID 

red = 125 + 50*(parseInt(niceB3CID.charAt(0)))
green = 125 + 50*(parseInt(niceB3CID.charAt(1)))
blue = 125 + 50*(parseInt(niceB3CID.charAt(2)))

$('.post').css('background-color', "rgb("+red+","+green+","+blue+")")

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JSFiddle - React, Tailwind, and code Playground

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