<div class="colors">
  <div class="item">Surface1</div>
  <div class="item">Surface2</div>
  <div class="item">Surface3</div>
  <div class="item">Surface4</div>
</div>

<pre class="language-css"><code>
:root {
  --primary-hue: 250;
  --primary-saturation: 100%;
  --primary-lightness: 90%;
  --primary-light: hsl(
    var(--primary-hue) var(--primary-saturation) var(--primary-lightness)
  );
  --on-primary-light: hsl(var(--primary-hue) var(--primary-saturation) 10%);

  --surface1-light: hsl(var(--primary-hue) 40% 90%);
  --surface2-light: hsl(var(--primary-hue) 30% 99%);
  --surface3-light: hsl(var(--primary-hue) 30% 92%);
  --surface4-light: hsl(var(--primary-hue) 30% 85%);
}
</code></pre>

@import url("https://fonts.googleapis.com/css2?family=Exo:wght@600&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 100vw;
  min-height: 100vh;
  font-family: "Exo", Arial, sans-serif;
  background-color: #557;
  padding: 20px;

  display: grid;
  gap: 10px;
  place-content: center;
}

:root {
  --primary-hue: 250;
  --primary-saturation: 100%;
  --primary-lightness: 90%;
  --primary-light: hsl(
    var(--primary-hue) var(--primary-saturation) var(--primary-lightness)
  );
  --on-primary-light: hsl(var(--primary-hue) var(--primary-saturation) 10%);

  --surface1-light: hsl(var(--primary-hue) 40% 90%);
  --surface2-light: hsl(var(--primary-hue) 30% 99%);
  --surface3-light: hsl(var(--primary-hue) 30% 92%);
  --surface4-light: hsl(var(--primary-hue) 30% 85%);
}

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

.item {
  width: 25vmin;
  margin: 0 auto;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--primary-light);
  color: var(--on-primary-light);
}

.item:nth-child(1) {
  background-color: var(--surface1-light);
}

.item:nth-child(2) {
  background-color: var(--surface2-light);
}

.item:nth-child(3) {
  background-color: var(--surface3-light);
}

.item:nth-child(4) {
  background-color: var(--surface4-light);
}