#8ED0CE

CSS

:root {
  --cold-blue: #8ed0ce;
  --cold-blue-rgb: 142 208 206;
  --cold-blue-oklch: oklch(0.813 0.067 193.5);
}

.element {
  color: var(--cold-blue);
  background-color: hsl(178 41% 69%);
  border-color: oklch(0.813 0.067 193.5);
}

Tailwind CSS v4

@theme {
  --color-cold-blue: #8ed0ce;
  --color-cold-blue-50: #e0fcfb;
  --color-cold-blue-100: #cfefef;
  --color-cold-blue-200: #b4dedd;
  --color-cold-blue-300: #8fc3c2;
  --color-cold-blue-400: #6eabaa;
  --color-cold-blue-500: #4b9493;
  --color-cold-blue-600: #407d7c;
  --color-cold-blue-700: #336463;
  --color-cold-blue-800: #244a48;
  --color-cold-blue-900: #183332;
  --color-cold-blue-950: #081f1e;
}

SCSS

$cold-blue: #8ed0ce;
$cold-blue-rgb: 142, 208, 206;
$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);
}