#48807D

CSS

:root {
  --turquoise-tortoise: #48807d;
  --turquoise-tortoise-rgb: 72 128 125;
  --turquoise-tortoise-oklch: oklch(0.561 0.06 191.1);
}

.element {
  color: var(--turquoise-tortoise);
  background-color: hsl(177 28% 39%);
  border-color: oklch(0.561 0.06 191.1);
}

Tailwind CSS v4

@theme {
  --color-turquoise-tortoise: #48807d;
  --color-turquoise-tortoise-50: #e3fbfa;
  --color-turquoise-tortoise-100: #d2efed;
  --color-turquoise-tortoise-200: #b8dddb;
  --color-turquoise-tortoise-300: #94c2c0;
  --color-turquoise-tortoise-400: #75aaa7;
  --color-turquoise-tortoise-500: #549390;
  --color-turquoise-tortoise-600: #487c79;
  --color-turquoise-tortoise-700: #396461;
  --color-turquoise-tortoise-800: #294947;
  --color-turquoise-tortoise-900: #1b3331;
  --color-turquoise-tortoise-950: #0b1e1d;
}

SCSS

$turquoise-tortoise: #48807d;
$turquoise-tortoise-rgb: 72, 128, 125;
$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);
}