Blue Green

CSS

:root {
  --blue-green: #137e6d;
  --blue-green-rgb: 19 126 109;
  --blue-green-oklch: oklch(0.533 0.093 178.4);
}

.element {
  color: var(--blue-green);
  background-color: hsl(170 74% 28%);
  border-color: oklch(0.533 0.093 178.4);
}

Tailwind CSS v4

@theme {
  --color-blue-green: #137e6d;
  --color-blue-green-50: #d9fff6;
  --color-blue-green-100: #c7f3e9;
  --color-blue-green-200: #a9e2d6;
  --color-blue-green-300: #80c7b9;
  --color-blue-green-400: #5ab19f;
  --color-blue-green-500: #299a87;
  --color-blue-green-600: #268272;
  --color-blue-green-700: #1e685b;
  --color-blue-green-800: #154d41;
  --color-blue-green-900: #0e352d;
  --color-blue-green-950: #01201a;
}

SCSS

$blue-green: #137e6d;
$blue-green-rgb: 19, 126, 109;
$blue-green-light: mix(#fff, $blue-green, 20%);
$blue-green-dark: mix(#000, $blue-green, 20%);

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