#527368

CSS

:root {
  --turquoise-tortoise: #527368;
  --turquoise-tortoise-rgb: 82 115 104;
  --turquoise-tortoise-oklch: oklch(0.527 0.042 172);
}

.element {
  color: var(--turquoise-tortoise);
  background-color: hsl(160 17% 39%);
  border-color: oklch(0.527 0.042 172);
}

Tailwind CSS v4

@theme {
  --color-turquoise-tortoise: #527368;
  --color-turquoise-tortoise-50: #eaf9f4;
  --color-turquoise-tortoise-100: #daede7;
  --color-turquoise-tortoise-200: #c3dad3;
  --color-turquoise-tortoise-300: #a2bfb6;
  --color-turquoise-tortoise-400: #86a79c;
  --color-turquoise-tortoise-500: #6a9083;
  --color-turquoise-tortoise-600: #5a796f;
  --color-turquoise-tortoise-700: #486159;
  --color-turquoise-tortoise-800: #344740;
  --color-turquoise-tortoise-900: #23312c;
  --color-turquoise-tortoise-950: #121d19;
}

SCSS

$turquoise-tortoise: #527368;
$turquoise-tortoise-rgb: 82, 115, 104;
$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);
}