#8ED6D3

CSS

:root {
  --cold-blue: #8ed6d3;
  --cold-blue-rgb: 142 214 211;
  --cold-blue-oklch: oklch(0.828 0.072 192.5);
}

.element {
  color: var(--cold-blue);
  background-color: hsl(177 47% 70%);
  border-color: oklch(0.828 0.072 192.5);
}

Tailwind CSS v4

@theme {
  --color-cold-blue: #8ed6d3;
  --color-cold-blue-50: #dffcfb;
  --color-cold-blue-100: #cdf0ef;
  --color-cold-blue-200: #b1dedd;
  --color-cold-blue-300: #8cc3c2;
  --color-cold-blue-400: #69acaa;
  --color-cold-blue-500: #449593;
  --color-cold-blue-600: #3b7e7c;
  --color-cold-blue-700: #2f6563;
  --color-cold-blue-800: #214a48;
  --color-cold-blue-900: #163432;
  --color-cold-blue-950: #061f1e;
}

SCSS

$cold-blue: #8ed6d3;
$cold-blue-rgb: 142, 214, 211;
$cold-blue-light: mix(#fff, $cold-blue, 20%);
$cold-blue-dark: mix(#000, $cold-blue, 20%);

.element {
  color: $cold-blue;
  box-shadow: 0 0 0 2px rgba($cold-blue, 0.35);
}