#008978

CSS

:root {
  --go-go-green: #008978;
  --go-go-green-rgb: 0 137 120;
  --go-go-green-oklch: oklch(0.565 0.102 180);
}

.element {
  color: var(--go-go-green);
  background-color: hsl(173 100% 27%);
  border-color: oklch(0.565 0.102 180);
}

Tailwind CSS v4

@theme {
  --color-go-go-green: #008978;
  --color-go-go-green-50: #d6fff7;
  --color-go-go-green-100: #c3f4ea;
  --color-go-go-green-200: #a3e3d7;
  --color-go-go-green-300: #79c9bb;
  --color-go-go-green-400: #4eb2a1;
  --color-go-go-green-500: #009c89;
  --color-go-go-green-600: #0d8474;
  --color-go-go-green-700: #0c6a5c;
  --color-go-go-green-800: #084e42;
  --color-go-go-green-900: #06362e;
  --color-go-go-green-950: #00211b;
}

SCSS

$go-go-green: #008978;
$go-go-green-rgb: 0, 137, 120;
$go-go-green-light: mix(#fff, $go-go-green, 20%);
$go-go-green-dark: mix(#000, $go-go-green, 20%);

.element {
  color: $go-go-green;
  box-shadow: 0 0 0 2px rgba($go-go-green, 0.35);
}