#497E72

CSS

:root {
  --turquoise-tortoise: #497e72;
  --turquoise-tortoise-rgb: 73 126 114;
  --turquoise-tortoise-oklch: oklch(0.552 0.06 177.8);
}

.element {
  color: var(--turquoise-tortoise);
  background-color: hsl(166 27% 39%);
  border-color: oklch(0.552 0.06 177.8);
}

Tailwind CSS v4

@theme {
  --color-turquoise-tortoise: #497e72;
  --color-turquoise-tortoise-50: #e4fbf6;
  --color-turquoise-tortoise-100: #d3efe8;
  --color-turquoise-tortoise-200: #baddd5;
  --color-turquoise-tortoise-300: #97c2b8;
  --color-turquoise-tortoise-400: #78ab9e;
  --color-turquoise-tortoise-500: #589486;
  --color-turquoise-tortoise-600: #4b7d71;
  --color-turquoise-tortoise-700: #3c645b;
  --color-turquoise-tortoise-800: #2b4941;
  --color-turquoise-tortoise-900: #1d332d;
  --color-turquoise-tortoise-950: #0d1f1a;
}

SCSS

$turquoise-tortoise: #497e72;
$turquoise-tortoise-rgb: 73, 126, 114;
$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);
}