#507E6D

CSS

:root {
  --turquoise-tortoise: #507e6d;
  --turquoise-tortoise-rgb: 80 126 109;
  --turquoise-tortoise-oklch: oklch(0.555 0.057 168.9);
}

.element {
  color: var(--turquoise-tortoise);
  background-color: hsl(158 22% 40%);
  border-color: oklch(0.555 0.057 168.9);
}

Tailwind CSS v4

@theme {
  --color-turquoise-tortoise: #507e6d;
  --color-turquoise-tortoise-50: #e6fbf3;
  --color-turquoise-tortoise-100: #d6eee5;
  --color-turquoise-tortoise-200: #bdddd1;
  --color-turquoise-tortoise-300: #9bc1b3;
  --color-turquoise-tortoise-400: #7daa98;
  --color-turquoise-tortoise-500: #5f9380;
  --color-turquoise-tortoise-600: #517c6c;
  --color-turquoise-tortoise-700: #406356;
  --color-turquoise-tortoise-800: #2f493e;
  --color-turquoise-tortoise-900: #1f332b;
  --color-turquoise-tortoise-950: #0f1e18;
}

SCSS

$turquoise-tortoise: #507e6d;
$turquoise-tortoise-rgb: 80, 126, 109;
$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);
}