#458176

CSS

:root {
  --turquoise-tortoise: #458176;
  --turquoise-tortoise-rgb: 69 129 118;
  --turquoise-tortoise-oklch: oklch(0.559 0.065 180.6);
}

.element {
  color: var(--turquoise-tortoise);
  background-color: hsl(169 30% 39%);
  border-color: oklch(0.559 0.065 180.6);
}

Tailwind CSS v4

@theme {
  --color-turquoise-tortoise: #458176;
  --color-turquoise-tortoise-50: #e2fcf7;
  --color-turquoise-tortoise-100: #d1efea;
  --color-turquoise-tortoise-200: #b7ded6;
  --color-turquoise-tortoise-300: #93c3ba;
  --color-turquoise-tortoise-400: #72aba0;
  --color-turquoise-tortoise-500: #519588;
  --color-turquoise-tortoise-600: #457e73;
  --color-turquoise-tortoise-700: #37655c;
  --color-turquoise-tortoise-800: #274a43;
  --color-turquoise-tortoise-900: #1a332e;
  --color-turquoise-tortoise-950: #0a1f1b;
}

SCSS

$turquoise-tortoise: #458176;
$turquoise-tortoise-rgb: 69, 129, 118;
$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);
}