#4A7F71

CSS

:root {
  --turquoise-tortoise: #4a7f71;
  --turquoise-tortoise-rgb: 74 127 113;
  --turquoise-tortoise-oklch: oklch(0.555 0.061 175.1);
}

.element {
  color: var(--turquoise-tortoise);
  background-color: hsl(164 26% 39%);
  border-color: oklch(0.555 0.061 175.1);
}

Tailwind CSS v4

@theme {
  --color-turquoise-tortoise: #4a7f71;
  --color-turquoise-tortoise-50: #e4fbf5;
  --color-turquoise-tortoise-100: #d3efe7;
  --color-turquoise-tortoise-200: #baddd4;
  --color-turquoise-tortoise-300: #97c2b7;
  --color-turquoise-tortoise-400: #78ab9c;
  --color-turquoise-tortoise-500: #589484;
  --color-turquoise-tortoise-600: #4b7d70;
  --color-turquoise-tortoise-700: #3c6459;
  --color-turquoise-tortoise-800: #2b4940;
  --color-turquoise-tortoise-900: #1d332c;
  --color-turquoise-tortoise-950: #0d1f19;
}

SCSS

$turquoise-tortoise: #4a7f71;
$turquoise-tortoise-rgb: 74, 127, 113;
$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);
}