#4F7F73

CSS

:root {
  --turquoise-tortoise: #4f7f73;
  --turquoise-tortoise-rgb: 79 127 115;
  --turquoise-tortoise-oklch: oklch(0.558 0.056 176.5);
}

.element {
  color: var(--turquoise-tortoise);
  background-color: hsl(165 23% 40%);
  border-color: oklch(0.558 0.056 176.5);
}

Tailwind CSS v4

@theme {
  --color-turquoise-tortoise: #4f7f73;
  --color-turquoise-tortoise-50: #e5fbf5;
  --color-turquoise-tortoise-100: #d5eee8;
  --color-turquoise-tortoise-200: #bcddd4;
  --color-turquoise-tortoise-300: #99c1b8;
  --color-turquoise-tortoise-400: #7baa9d;
  --color-turquoise-tortoise-500: #5c9385;
  --color-turquoise-tortoise-600: #4f7c71;
  --color-turquoise-tortoise-700: #3f635a;
  --color-turquoise-tortoise-800: #2d4941;
  --color-turquoise-tortoise-900: #1f332d;
  --color-turquoise-tortoise-950: #0e1e1a;
}

SCSS

$turquoise-tortoise: #4f7f73;
$turquoise-tortoise-rgb: 79, 127, 115;
$turquoise-tortoise-light: mix(#fff, $turquoise-tortoise, 20%);
$turquoise-tortoise-dark: mix(#000, $turquoise-tortoise, 20%);

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