#8CD0CE

CSS

:root {
  --cold-blue: #8cd0ce;
  --cold-blue-rgb: 140 208 206;
  --cold-blue-oklch: oklch(0.812 0.069 193.5);
}

.element {
  color: var(--cold-blue);
  background-color: hsl(178 42% 68%);
  border-color: oklch(0.812 0.069 193.5);
}

Tailwind CSS v4

@theme {
  --color-cold-blue: #8cd0ce;
  --color-cold-blue-50: #e0fcfb;
  --color-cold-blue-100: #cff0ef;
  --color-cold-blue-200: #b3dedd;
  --color-cold-blue-300: #8ec3c2;
  --color-cold-blue-400: #6cacaa;
  --color-cold-blue-500: #489593;
  --color-cold-blue-600: #3e7e7c;
  --color-cold-blue-700: #326564;
  --color-cold-blue-800: #234a48;
  --color-cold-blue-900: #173332;
  --color-cold-blue-950: #081f1e;
}

SCSS

$cold-blue: #8cd0ce;
$cold-blue-rgb: 140, 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);
}