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HTML 

              
                <h1>Choose 2 Colors to Mix</h1>
<br><div class="nav">
	<div>
		<input type="color" id="start" name="start" value="#e66465" />
		<!-- <label for="start">Start Color</label> -->
	</div>

	<div>
		<input type="color" id="end" name="end" value="#f6b73c" />
		<!-- <label for="end">End Color</label> -->
	</div>
	<button id="sample">Next Sample</button>

</div>
<div class="display">
	

<h2>Step through array of colors <a href="#" onclick="copyToClipboard()"> Copy Array to Clipboard</a></h2>
<div class="colorBar boxes"></div>
<h2>oklch color mix gradient<br><span id="oklchCode"></span></h2>
<div class="colorBar oklch"></div>
<h2>normal gradient<br><span id="normalCode"></span></h2>

<div class="colorBar normal"></div>
</div>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css2?family=Saira+Extra+Condensed:wght@800&family=Staatliches&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Poppins&display=swap');


* {
	position:relative;
	box-sizing:border-box;
}
body, html{
	width:100%;
}

body {
	margin:0;
	display:flex;
	align-items:center;
	justify-content:center;
	background:#cce8ed;
	flex-direction:column;
}

.nav {
	margin:10px;
	display:flex;
	align-items:center;
	justify-content:center;
	gap:50px;
}

.display {
	width:100%;
}

h1 {
	font-family: 'Saira Extra Condensed', sans-serif;
	margin:0.2em 0 0 0;
	color:#002953;
	font-size: clamp(30px, 4vw, 80px);
}

h2 {
	margin:2.5em 0 1em 2em;
	font-family:sans-serif;
	font-weight:normal;
	color:#111;
	font-size:1.1em;
}

h2:first-child {
	margin-bottom:0.5em;
}

h2 span {
	font-family:Courier, sans-serif;
	font-size:0.9em;
	padding:0.5em;
	background:#ececdd;
	border-radius:4px;
	margin:0.5em 1em 0 0;
	display:inline-block;
	box-shadow:2px 2px 2px 2px rgb(0, 0, 0, 0.1);
}

.color {
	width:50px;
	height:50px;
	background:grey;
}

.colorBar {
	width:100%;
	height:clamp(75px, 15vh, 150px);
	display:flex;
	flex-direction:row;
	margin-bottom:4px;
}

.boxes div {
	width:100%;
	height:100%;
}

button {
	padding:1em;
}

input[type="color" i] {
    appearance: auto;
    inline-size: 100px;
    block-size: 100px;
    cursor: default;
    box-sizing: border-box;
    background-color: buttonface;
    color: buttontext;
    border-width: 1px;
    border-style: solid;
    border-color: buttonborder;
    border-image: initial;
    padding: 1px 2px;
}

@media screen and (max-width: 475px) {
  h2 span {
    display: none;
  }
	h2 {
		margin:0.2em;
	}
}
!

JS 

              
                const boxes = document.querySelector(".boxes")
const oklch = document.querySelector(".oklch")
const normal = document.querySelector(".normal")
let colors = []

/* --- CONFIG --- */

const steps = 12;

/* --- END CONFIG --- */


const samples = [
	["#ffff00", "#0000ff"],
	["#ee00ff", "#00ff00"],
	["#ccffff", "#700000"],
	["#2eff89", "#081e35"],
	["#ffd747", "#291929"],
	["#c3ffc2", "#8f62ac"],
	["#f5f53d", "#0c0c12"]
]

let sampleIndex = 0
const sampleMax = samples.length



//generate an array of mixed colors

function mixColors(start, end, steps) {
	colors = []
	steps-=1
	for(let i = 0; i <= steps; i++){
		let percent = i/steps * 100
		colors.push(`color-mix(in oklch, ${start}, ${end} ${percent}%)`)
	}
	console.clear()
	console.log(colors)
	return colors
}









function change() {
	let start = startPicker.value
   let end = endPicker.value
	let colors = mixColors(start, end, steps)
	//update boxes
	gsap.set(".boxes div", {backgroundColor:gsap.utils.wrap(colors)})
	
	//update oklch gradient preview
	oklch.style.background = `linear-gradient(to right in oklch shorter hue, ${start}, ${end})`
	oklchCode.innerHTML = `background: linear-gradient(to right in oklch shorter hue, ${start}, ${end});`
	
	
	//update normal css gradient preview
	normal.style.background = `linear-gradient(90deg, ${start}, ${end})`
	normalCode.innerHTML = `background: linear-gradient(90deg, ${start}, ${end});`
	
	
}

sample.addEventListener("click", () => {
	sampleIndex++
	sampleIndex = sampleIndex%sampleMax
	startPicker.value = samples[sampleIndex][0]
	endPicker.value = samples[sampleIndex][1]
	change()
})

function init() {
	for (let i = 0; i < steps; i++){
		let newDiv = document.createElement("div")
		boxes.appendChild(newDiv)
	}
  	startPicker = document.querySelector("#start")
  	startPicker.value = samples[0][0]
  	startPicker.addEventListener("input", change, false)
 
	
  	endPicker = document.querySelector("#end")
  	endPicker.value = samples[0][1]
  	endPicker.addEventListener("input", change, false)
 
  	change()
	
}

function copyToClipboard() {
	navigator.clipboard.writeText(`let colors = [${colors}]`);
	alert(`Copied to Clipboard \nlet colors = [${colors}]`)
}


init()
!
999px

Console